jump start JEEP YJ 1995 Service And User Guide

INDICATOR LAMPS
If an individual indicator lamp is inoperative, see
the diagnostic procedure under the heading for that
lamp. If more than one indicator lamp or a combina-
tion of lamps and gauges in the main cluster or the
gauge package cluster is inoperative, see Gauges in
this section for diagnosis.
ANTI-LOCK BRAKE SYSTEM LAMP
The diagnosis found here addresses an inoperative
lamp condition. If the ABS lamp stays on with the ig-
nition switch in the ON position, or comes on and
stays on while driving, refer to Group 5 - Brakes for
diagnosis. If no ABS problem is found, the following
procedure will help locate a short or open in the ABS
lamp circuit.
(1) Disconnect battery negative cable. Remove left
instrument cluster bezel and main cluster assembly.
Disconnect ABS control module connector.
(2) Install a jumper wire between cavity 6 of clus-
ter connector and a good ground. Connect battery
negative cable. Turn ignition switch to ON. Lamp
should light. If OK, remove jumper wire and go to
next step. If not OK, replace bulb.
(3) Turn ignition switch to OFF. Disconnect battery
negative cable and unplug cluster connector. Check
for continuity between cavity 6 of cluster connector
and a good ground. There should be no continuity. If
OK, go to next step. If not OK, repair short circuit as
required.
(4) Check continuity between cavity 6 of cluster
connector and cavity 52 of ABS control module con-
nector (Fig. 6). There should be continuity. If OK, re-
fer to Group 5 - Brakes for diagnosis of ABS control
module. If not OK, repair open circuit as required.
BRAKE WARNING LAMP
The diagnosis found here addresses an inoperative
lamp condition. If the brake warning lamp stays on
with the ignition switch in the ON position and the
parking brake released, refer to Group 5 - Brakes for
diagnosis. If no service brake or parking brake prob-
lem is found, the following procedure will help locate
a short circuit or faulty switch.
(1) Unplug parking brake switch connector. Turn
ignition switch to START position. Lamp should
light. Release ignition switch to ON position. Lamp
should go off. If OK, go to step 10. If not OK, go to
next step.
(2) Unplug brake warning switch connector. Install
a jumper wire between two cavities of connector.
Turn ignition switch to START. Lamp should light.
Remove jumper wire and lamp should go off. If OK,
replace brake warning switch. If not OK, remove
jumper wire and go to next step.
(3) Turn ignition switch to ON position. Install a
jumper wire between brake warning switch connectorcavity for circuit G9 and a good ground. Lamp should
light. If OK, go to step 5. If not OK, go to next step.
(4) Turn ignition switch to OFF. Remove jumper
wire and disconnect battery negative cable. Remove
left instrument cluster bezel and main cluster. Install
a jumper wire between cavity 1 of cluster connector
and a good ground. Connect battery negative cable
and turn ignition switch to ON. Lamp should light. If
OK, repair open in circuit to brake warning switch. If
not OK, replace bulb.
(5) Turn ignition switch to OFF and remove
jumper wire. Disconnect battery negative cable.
Check for continuity between brake warning switch
connector cavity for circuit G11 and a good ground
with ignition switch in START position. There should
be continuity. If not OK, go to next step.
(6) Turn ignition switch to OFF and remove
jumper wire. Unplug ignition switch connectors.
Check for continuity between ignition switch connec-
tor cavity for G11 circuit and a good ground. There
should be no continuity. If OK, go to next step. If not
OK, repair short circuit between ignition switch and
brake warning switch connectors as required.
(7) Check for continuity between ignition switch
connector cavity for G11 circuit and brake warning
switch connector cavity for G11 circuit. There should
be continuity. If OK, go to next step. If not OK, re-
pair open circuit as required.
(8) Check for continuity between metal steering
column jacket and a good ground. There should be
continuity. If OK, go to next step. If not OK, refer to
Group 19 - Steering to check steering column ground
clip installation.
Fig. 6 ABS Control Module Connector
8E - 32 INSTRUMENT PANEL AND GAUGESÐYJJ

(9) Turn ignition switch to START position and
hold there. Check for continuity between terminal for
circuit G11 of ignition switch and a good ground.
There should be continuity. If not OK, replace igni-
tion switch.
(10) Unplug brake warning switch connector.
Check for continuity between parking brake switch
connector and a good ground. There should be no
continuity. If OK, go to next step. If not OK, repair
short circuit as required.
(11) Check for continuity between parking brake
switch connector and brake warning switch connector
cavity for circuit G11. There should be continuity. If
OK, replace parking brake switch. If not OK, repair
open circuit to brake warning switch as required.
FOUR-WHEEL DRIVE INDICATOR LAMP
(1) Apply parking brake, start engine, vehicle in
4WD Lock or 4WD.
(2) Unplug switch and touch harness side of wire
to ground. Lamp should light. If OK, check switch
operation, replace if bad. If bulb is OK, repair open
to indicator.
HEADLAMP HIGH BEAM INDICATOR LAMP
(1) Check that headlamp high beams are func-
tional. If OK, go to next step. If not OK, refer to
Group 8L - Lamps for diagnosis of headlamp system.
(2) Disconnect battery negative cable. Remove left
instrument cluster bezel and main cluster assembly.
Unplug cluster connector. Connect battery negative
cable. Turn headlamps on and select high beam.
Check for battery voltage at cavity 17 of cluster con-
nector. If OK, replace indicator bulb. If not OK, re-
pair circuit to headlamp dimmer switch as required.
MALFUNCTION INDICATOR LAMP
The diagnosis found here addresses an inoperative
lamp condition. If the lamp comes on and stays on
with engine running, refer to Group 14 - Fuel System
for diagnosis. If no fuel or emission system problem
is found, the following procedure will help locate a
short or open in the lamp circuit.
(1) Disconnect battery negative cable. Unplug PCM
connector. Install a jumper wire from cavity 32 of
PCM connector (Fig. 5) to a good ground. Connect
battery negative cable. Turn ignition switch to ON.
Lamp should light. Remove jumper wire and lamp
should go OFF. If OK, refer to Powertrain Diagnostic
Procedures to check PCM. If not OK, go to next step.
(2) Turn ignition switch to OFF. Disconnect battery
negative cable. Remove left instrument cluster bezel
and main cluster assembly. Install a jumper wire
from cavity 2 of cluster connector to a good ground.
Connect battery negative cable. Turn ignition switch
to ON. Lamp should light. If OK, go to next step. If
not OK, replace bulb.(3) Turn ignition switch to OFF. Disconnect battery
negative cable. Unplug cluster connector. Check for
continuity between cavity 2 of cluster connector and
a good ground. There should be no continuity. If OK,
go to next step. If not OK, repair short circuit to
PCM as required.
(4) Check continuity between cavity 2 of cluster
connector and cavity 32 of PCM connector. There
should be continuity. If not OK, repair open circuit to
PCM as required.
SEAT BELT REMINDER LAMP
(1) Refer to Group 8U - Chime/Buzzer Warning
Systems to check chime/buzzer module operation. If
OK, go to next step. If not OK, replace chime/buzzer
module.
(2) Disconnect battery negative cable. Remove left
instrument cluster bezel and main cluster assembly.
Unplug cluster connector. Check for continuity be-
tween cavity 20 of cluster connector and a good
ground. There should be continuity. If OK, plug clus-
ter connector back into cluster and go to next step. If
not OK, repair open circuit to ground as required.
(3) Connect battery negative cable. Install a
jumper wire between a 12-volt battery feed and cav-
ity 16 of cluster connector. Lamp should light. If OK,
go to next step. If not OK, replace bulb.
(4) Disconnect battery negative cable. Unplug
chime/buzzer module from fuseblock module. Unplug
cluster connector. Check for continuity between cav-
ity 16 of cluster connector and a good ground. There
should be no continuity. If OK, go to next step. If not
OK, repair short circuit to chime/buzzer module as
required.
(5) Check continuity between cavity 16 of cluster
connector and cavity for terminal A3 of chime/buzzer
module (Fig. 7) in fuseblock module. There should be
continuity. If not OK, repair open circuit to chime/
buzzer module as required.
Fig. 7 Chime/Buzzer Module Receptacle
JINSTRUMENT PANEL AND GAUGESÐYJ 8E - 33

STARTING SYSTEM
STARTING SYSTEM
AUTOMATIC TRANSMISSIONS
Circuit A0 from the battery is double crimped at
the positive battery post. One branch of circuit A0
(battery positive cable) connects to the engine starter
motor. The other A0 branch supplies voltage to the
bus bar in the Power Distribution Center (PDC).
The PDC supplies battery voltage to the engine
starter motor solenoid on circuit T40 when the coil
side of the engine starter motor relay energizes. Cir-
cuit A1 from the fuse 4 in the PDC supplies battery
voltage to the contact side of the starter motor relay.
The ignition switch supplies battery voltage to the
coil side of the starter motor relay on circuit A41
when the key is moved to the START position and
the Park/Neutral position switch is closed. Ground
for the coil side of the starter motor relay is supplied
by the case grounded Park/Neutral position switch.
Circuit T41 connects the coil side of the relay to the
Park/Neutral position switch.
When the starter motor relay energizes and the
contacts close, circuit T40 supplies battery voltage to
the starter motor solenoid. Circuit A0 from the bat-
tery supplies voltage to the starter motor when the
solenoid energizes.
MANUAL TRANSMISSIONS
Circuit A0 from the battery is double crimped at
the positive battery post. One branch of circuit A0
(battery positive cable) connects to the battery
starter motor. The other A0 branch supplies voltage
to the bus bar in the Power Distribution Center
(PDC).The PDC supplies battery voltage to the engine
starter motor solenoid on circuit T40 when the coil
side of the engine starter motor relay energizes. Cir-
cuit A1 from the fuse 4 in the PDC supplies battery
voltage to the contact side of the starter motor relay.
The ignition switch supplies battery voltage to the
coil side of the starter motor relay on circuit A41
when the key is moved to the START position. Cir-
cuit T41 from the coil side of the relay connects to a
Z2 jumper wire in the back-up lamp switch. Circuit
Z2 provides ground for the starter motor relay.
When the starter motor relay energizes and the
contacts close, circuit T40 supplies battery voltage to
the starter motor solenoid. Circuit A0 from the bat-
tery supplies voltage to the starter motor when the
solenoid energizes.
HELPFUL INFORMATION
²The Park/Neutral switch closes when the trans-
mission is in either the PARK or NEUTRAL posi-
tions.
²Circuit T41 also connects to cavity 30 of the Pow-
ertrain Control Module (PCM). This input tells the
PCM the operator is starting the vehicle.
DIAGRAM INDEX
Component Page
Engine Starter Motor......................8W-21-2
Engine Starter Motor Relay..................8W-21-2
Ignition Switch..........................8W-21-2
Park/Neutral Position Switch.................8W-21-2
Power Distribution Center (PDC)...............8W-21-2
Powertrain Control Module (PCM)..............8W-21-2
Fuse 4 (PDC)...........................8W-21-2
J8W-21 STARTING SYSTEMÐYJ VEHICLES 8W - 21 - 1

AIR CONDITIONING AND HEATER
GENERAL INFORMATION
On vehicles built with the 2.5L engine, the electri-
cal system has provisions for dealer installed air con-
ditioning. The provisions consist of two connectors
which include circuitry for:
²Circuit C1 - Ignition feed
²Circuit C21 - Blower motor switch
²Circuit C91 - A/C request signal
²Circuit C20 - A/C select signal
²Circuit C13 - Ground for coil side of A/C compres-
sor clutch relay
²Circuit G5 - Battery voltage for coil side of A/C
compressor clutch relay
A/C COMPRESSOR
When the ignition switch is in the RUN position it
connects circuit A1 from fuse 4 in the Power Distri-
bution Center (PDC) to circuit A22. Circuit A22 sup-
plies battery voltage to fuse 12 in the fuse block.
Fuse 12 powers circuit C1.
Circuit C1 supplies battery voltage to the A/C
blower switch. Circuit C21 connects the A/C blower
switch to the A/C low pressure switch.
When the operator selects A/C operation, the A/C
blower switch provides the A/C request signal to cav-
ity 27 of the Powertrain Control Module (PCM) on
circuit C91. At the same time, the blower switch sup-
plies voltage through the A/C thermostat to circuit
C21.
Circuit C21 supplies voltage to the A/C low pres-
sure switch. When the A/C low pressure switch
closes, circuit C20 provides battery voltage to the
contact side of the A/C compressor clutch relay and
provides the A/C select signal to the PCM. Circuit
C20 is double crimped at the contact side of the re-
lay. The C20 circuit branch from the relay supplies
the A/C select input to cavity 28 of the PCM.
After receiving the A/C request signal, the PCM en-
ergizes the A/C compressor clutch relay by providing
ground for the coil side of the relay on circuit C13.
Circuit C13 connects to cavity 34 of the PCM.
Circuit G5 from fuse 9 in the fuse block supplies
voltage to the coil side of the relay. In the START or
RUN positions the ignition switch connects circuit A1
from fuse 4 in the PDC with circuit A21. Circuit A21
connects to the fuse block bus bar that powers circuit
C5 through fuse 9.
When the PCM energizes the A/C compressor
clutch relay, the relay switches from its normally
grounded position to connect circuit C20 to circuit
C3. Circuit C3 supplies voltage to the case grounded
A/C compressor clutch.
HELPFUL INFORMATION
²Circuit G5 is double crimped at the coil side of the
A/C compressor clutch relay. The G5 branch from the
relay continues to the back-up lamp switch.
²Circuit Z1 provides ground for the A/C compressor
clutch relay when the relay is in its normally
grounded position.
A/C-HEATER BLOWER MOTOR
When the ignition switch is in the RUN position it
connects circuit A1 from fuse 4 in the Power Distri-
bution Center (PDC) to circuit A22. Circuit A22 sup-
plies battery voltage to fuse 12 in the fuse block.
Fuse 12 powers circuit C1.
Circuit C1 supplies battery voltage to the A/C
blower switch. In the LOW position, the A/C blower
switch supplies voltage to the low speed brush of the
blower motor. In the MEDIUM position, the switch
supplies voltage to the medium speed bush of the
blower motor. In the HIGH position, the switch sup-
plies voltage to the high speed brush of the blower
motor.
The blower motor has a field jumper. The ground
circuit for the blower motor connects to the cigar
lighter. Circuit Z1 provides ground for the blower mo-
tor and the cigar lighter.
HELPFUL INFORMATION
²Check fuse 4 in the PDC.
²Check fuse 12 in the fuse block.
DIAGRAM INDEX
Component Page
A/C Compressor Clutch.....................8W-42-4
A/C Compressor Clutch Relay................8W-42-4
A/C Thermostat..........................8W-42-5
Blower Motor...........................8W-42-5
Blower Motor Switch......................8W-42-5
Fuse 4 (PDC).........................8W-42-4, 6
Fuse 7 (Fuse Block).......................8W-42-6
Fuse 9 (Fuse Block).....................8W-42-4, 6
Fuse 12 (Fuse Block)....................8W-42-4, 6
Ignition Switch........................8W-42-4, 6
Powertrain Control Module.................8W-42-4, 6
8W - 42 - 2 8W-42 AIR CONDITIONING/HEATERÐYJ VEHICLESJ

REAR LIGHTING
TAIL LAMPS AND LICENSE PLATE LAMPS
Circuit A6 in the Power Distribution Center (PDC)
connects to a bus bar in the fuse block. The fuse
block bus bar powers circuit F33. Circuit F33 con-
nects to the headlamp switch. Fuse 3 in the PDC
protects circuit A3. Fuse 8 in the fuse block protects
circuit F33.
The headlamp switch has three positions: ON,
PARK (parking lamps) and OFF, plus a dimmer
switch. When the headlamp switch is in the PARK or
ON position, the switch connects circuit F33 to cir-
cuit L7. From the headlamp switch, circuit L7
branches to power the front parking lamps and rear
tail and license plate lamps. The lamps are case
grounded.
HELPFUL INFORMATION
²If the vehicle is equipped with factory installed fog
lamps, circuit L7 splices to feed the park lamp relay.
²Jumper harnesses connect the tail, stop, turn sig-
nal lamp to the body harness.
²Check fuse 3 in the PDC.
²Check fuse 8 in the fuse block.
²Circuit L7 also feeds the radio, if equipped.
STOP LAMPS AND CHMSL LAMPS
Circuit A6 from fuse 3 in the Power Distribution
Center (PDC) supplies voltage to the fuse block bus
bar. The bus bar powers circuit F32 through fuse 3 in
the fuse block. Circuit F32 connects to the stop lamp
switch.
When the operator depresses the brake pedal, the
stop lamp switch closes, and connects circuit F32 to
circuit L50. Circuit L50 connects to the CHMSL
lamps and turn signal/hazard flasher. Circuit Z1 pro-
vides ground for the CHMSL lamps. The turn signal/
hazard flasher supplies current to the L62 and L63
circuits. Circuit L62 powers the right stop lamp. Cir-
cuit L63 powers the left stop lamp. The stop lamps
are case grounded.
HELPFUL INFORMATION
²Circuits L50 and Z1 pass through contacts in the
rear door before reaching the CHMSL lamps.
²Check fuse 3 in the PDC.²Check fuse 3 in the fuse block.
²Check for continuity across the stop lamp switch
when it is closed.
²If the vehicle is equipped with anti-lock brakes,
circuit L50 connects to the ABS module.
BACK-UP LAMPS
In the START or RUN position, the ignition switch
connects circuit A1 from fuse 4 in the Power Distri-
bution Center (PDC) to circuit A21. Circuit A21 feeds
a bus bar in the fuse block that powers circuit G5
through fuse 9.
Circuit G5 splices to supply power to the back-up
lamp switch. On automatic transmission vehicles, the
back-up lamp switch is part of an assembly that in-
cludes the PARK/NEUTRAL position switch.
When the operator puts the transmission in Re-
verse, the back-up lamp switch connects circuit G5 to
circuit L1. Circuit L1 feeds the case grounded
back-up lamps.
HELPFUL INFORMATION
²Check fuse 4 in the PDC.
²Check fuse 9 in the fuse block.
²Check for continuity across the back-up lamp
switch when it is closed.
DIAGRAM INDEX
Component Page
ABS Control Module......................8W-51-3
Back-Up Lamps..........................8W-51-4
Back-Up Lamp Switch.....................8W-51-2
Center High Mounted Stop Lamps (CHMSL).......8W-51-3
Fuse 3 (Fuse Block).......................8W-51-2
Fuse 3 (PDC)...........................8W-51-2
Fuse 4 (PDC)...........................8W-51-2
Fuse 9 (Fuse Block).......................8W-51-2
Fuse 8 (Fuse Block).......................8W-51-2
Headlamp Switch.........................8W-51-2
Ignition Switch..........................8W-51-2
Powertrain Control Module..................8W-51-3
Stop Lamp Switch........................8W-51-3
Tail, Stop, and Turn Signal Lamps.............8W-51-4
J8W-51 REAR LIGHTINGÐYJ VEHICLES 8W - 51 - 1

(8) Disconnect jumper wires from relay and 12 Volt
power source.
If continuity or resistance tests did not pass, re-
place relay. If tests passed, refer to Group 8W, Wiring
Diagrams for additional circuit information. Also re-
fer to the appropriate Powertrain Diagnostic Proce-
dures manual for operation of the DRB scan tool.
STARTER MOTOR RELAY TEST
Refer to Group 8A, Battery/Starting/Charging/Sys-
tem Diagnostics, for starter motor relay testing.
FUEL INJECTOR TEST
To perform a complete test of the fuel injectors and
their circuitry, refer to DRB scan tool and appropri-
ate Powertrain Diagnostics Procedures manual. To
test the injector only, refer to the following:
Disconnect the injector wire connector from the in-
jector. Place an ohmmeter on the injector terminals.
Resistance reading should be approximately 14.5
ohms61.2 ohms at 20ÉC (68ÉF). Proceed to the fol-
lowing Injector Diagnosis chart.When performing
the following tests from the chart, do not leave
electrical current applied to the injector for
longer than five seconds. Damage to injector
coil or internal injector seals could result.
FUEL SYSTEM PRESSURE TEST
Refer to the Fuel Delivery System section of this
group. See Fuel System Pressure Test.
ON-BOARD DIAGNOSTICS (OBD)
The powertrain control module (PCM) has been
programmed to monitor many different circuits of the
fuel injection system. If a problem is sensed in a
monitored circuit often enough to indicate an actual
problem, a Diagnostic Trouble Code (DTC) is stored.
The DTC will be stored in the PCM memory for even-
tual display to the service technician. If the problem
is repaired or ceases to exist, the PCM cancels the
DTC after 51 engine starts.Certain criteria must be met for a diagnostic trou-
ble code (DTC) to be entered into PCM memory. The
criteria may be a specific range of engine rpm, engine
temperature and/or input voltage to the PCM.
It is possible that a DTC for a monitored circuit
may not be entered into memory even though a mal-
function has occurred. This may happen because one
of the DTC criteria for the circuit has not been met.
Example: assume that one of the criteria for the
MAP sensor circuit is that the engine must be oper-
ating between 750 and 2000 rpm to be monitored for
a DTC. If the MAP sensor output circuit shorts to
ground when the engine rpm is above 2400 rpm, a 0
volt input will be seen by the PCM. A DTC will not
be entered into memory because the condition does
not occur within the specified rpm range.
A DTC indicates that the powertrain control mod-
ule (PCM) has recognized an abnormal signal in a
circuit or the system. A DTC may indicate the result
of a failure, but never identify the failed component
directly.
There are several operating conditions that the
PCM does not monitor and set a DTC for. Refer to
the following Monitored Circuits and Non-Monitored
Circuits in this section.
MONITORED CIRCUITS
The powertrain control module (PCM) can detect
certain problems in the fuel injection system.
Open or Shorted Circuit- The PCM can deter-
mine if sensor output (which is the input to PCM) is
within proper range. It also determines if the circuit
is open or shorted.
Output Device Current Flow- The PCM senses
whether the output devices are hooked up.
If there is a problem with the circuit, the PCM
senses whether the circuit is open, shorted to ground
(-), or shorted to (+) voltage.
Oxygen Sensor- The PCM can determine if the
oxygen sensor is switching between rich and lean.
This is, once the system has entered Closed Loop. Re-
fer to Open Loop/Closed Loop Modes Of Operation in
the Component Description/System Operation section
for an explanation of Closed (or Open) Loop opera-
tion.
NON-MONITORED CIRCUITS
The PCM does not monitor the following circuits,
systems or conditions that could have malfunctions
that result in driveability problems. A Diagnostic
Trouble Code (DTC) may not be displayed for these
conditions.
Fuel Pressure:Fuel pressure is controlled by the
vacuum assisted fuel pressure regulator. The PCM
cannot detect a clogged fuel pump inlet filter, clogged
in-line fuel filter, or a pinched fuel supply or return
Fig. 44 Fuel Injector Internal ComponentsÐTypical
JFUEL SYSTEM GENERAL DIAGNOSIS 14 - 51

HEATING AND AIR CONDITIONING TEST PROCEDURES
INDEX
page page
A/C Compressor Clutch..................... 15
A/C Compressor Clutch Relay................ 15
A/C Compressor Clutch Relay................ 16
Air Conditioning ControlsÐXJ Vehicles......... 15
Air Conditioning ControlsÐYJ Vehicles......... 16
Blower Motor............................ 17
Blower Motor Switch....................... 16Compressor Clutch........................ 16
Fin Sensing Cycling Clutch Switch............. 15
Heater Diagnosis......................... 17
Low-Pressure High-Pressure Cut-Off Switch..... 15
Low-Pressure High-Pressure Cut-Off Switch..... 16
Thermostatic Control....................... 16
AIR CONDITIONING CONTROLSÐXJ VEHICLES
The A/C Compressor Clutch is controlled by several
components: the Pressure Cut-Off Switch, Cycling
Clutch Switch, Clutch Relay and Powertrain Control
Module (PCM).
Powertrain Control Module may delay A/C clutch
engagement up to 30 seconds.
Refer to Group 8W Wiring Diagrams for wiring and
terminals. Use volt ohmmeter to test switches.
A/C COMPRESSOR CLUTCH
The clutch assembly consists of a stationary elec-
tromagnetic coil, hub bearing pulley assembly, and
clutch plate. When the coil is energized the plate is
magnetically engaged with the pulley and turns the
compressor shaft.
A/C COMPRESSOR CLUTCH TEST
(1) Unplug clutch coil connector.
(2) Connect a jumper wire from the battery posi-
tive post to the clutch coil terminal. The clutch
should engage, if not leave jumper wire connected
and go to next step.
(3) Connect a jumper wire from clutch coil frame to
chassis ground. The clutch should engage if not re-
pair clutch coil ground or replace coil.
A/C COMPRESSOR CLUTCH RELAY
The A/C compressor clutch relay controls the 12-
volt source to the A/C clutch. The relay is activated
when the PCM receives a A/C request signal from the
fin-sensed cycling clutch switch. The PCM then sends
a ground signal to the relay. The relay is activated
and sends 12-volts to the clutch coil which energizes
the clutch. The relay is located in the power distribu-
tion center.
COMPRESSOR CLUTCH RELAY TEST
For test procedure refer to Powertrain Diagnostic
Service Manual for A/C clutch relay circuit test.
LOW-PRESSURE HIGH-PRESSURE CUT-OFF
SWITCH
The pressure cut-off switch is located on the filter
drier and is wired in series with compressor clutch.
The switch interrupts the power to the compressor
clutch circuit when the pressure drops to 193 kPa (28
psi) or increases above 3100 to 3375 kPa (450 to 490
psi).
PRESSURE CUT-OFF SWITCH TEST
(1) Verify system has correct refrigerant charge.
(2) Turn ignition switch to RUN, A/C blower switch
to ON and control set to MAX.
(3) Unplug pressure cut-off switch and test feed
circuit from select switch. It should be battery volt-
age if not, repair open to select switch.
(4) Test for continuity between the switch termi-
nals. If continuity is not present recover refrigerant
from the system. Replace switch, evacuate and re-
charge system.
FIN SENSING CYCLING CLUTCH SWITCH
The switch is attached to the evaporator coil with
the temperature sensing probe inserted into the coil
fins. This switch prevents condensate water on the
evaporator coil from freezing. It does this by sending
signals to the PCM to cycling the compressor clutch
on and off.
FIN-SENSED CYCLING CLUTCH SWITCH TEST
Test area ambient temperature should be around
21ÉC (70ÉF) for test.
(1) Verify system has correct refrigerant charge.
(2) Start Engine and turn on A/C.
(3) If the compressor clutch cycles ON and OFF 2
to 3 times per minute the cycling clutch switch is
normal. The ambient temperature should be between
20ÉC-30ÉC (68ÉF-90ÉF). Above 32ÉC (90ÉF) the com-
pressor clutch may stay engaged (non cycling) due to
the high heat load, this condition is normal. If the
compressor clutch fails to engage go to next step.
(4) Disconnect wiring harness connector from
switch. With a volt meter test feed circuit from cut-
JHEATING AND AIR CONDITIONING 24 - 15

HEATER AND A/C CONTROL
REPLACEMENT......................24-23
HEATER AND A/C OPERATION...........24-1
HEATER AND AIR CONDITIONING; AIR
CONDITIONING/HEATER (YJ).........8W-42-2
HEATER CONTROL PANEL LAMP,
ACCESSORY LAMP; INTERIOR
LIGHTING (YJ)....................8W-44-1
HEATER CONTROL REPLACEMENT.......24-32
HEATER CORE.......................24-26
HEATER CORE AND HOUSING..........24-33
HEATER DIAGNOSIS..................24-17
HEATER ELEMENTS; POWER MIRRORS
(XJ-RHD).........................8W-62-1
HEATER, ENGINE BLOCK................7-44
HEATER HOUSING REPLACEMENT.......24-26
HEATER SYSTEM; AIR CONDITIONING/
HEATER (XJ)......................8W-42-1
HEATER SYSTEM; AIR CONDITIONING/
HEATER (XJ-RHD)..................8W-42-1
HEATER SYSTEM; AIR CONDITIONING/
HEATER (YJ)......................8W-42-1
HEATER/DEFROSTER/INSTRUMENT
PANEL OUTLET VACUUM MOTOR
REPLACEMENT......................24-26
HEATING AND AIR CONDITIONING TEST
PROCEDURES.......................24-15
HEATING ELEMENT TEST, OXYGEN
SENSOR (O2S)......................14-48
HEATING SCHEMATICÐXJ..............24-2
HEATING SYSTEM DIAGNOSIS..........24-18
HELPFUL INFORMATION; CHARGING
SYSTEM (XJ).....................8W-20-1
HELPFUL INFORMATION; CHARGING
SYSTEM (XJ-RHD).................8W-20-1
HELPFUL INFORMATION; CHARGING
SYSTEM (YJ).....................8W-20-1
HELPFUL INFORMATION; POWER SEAT
(XJ).............................8W-63-1
HELPFUL INFORMATION; POWER
WINDOWS (XJ)....................8W-60-2
HELPFUL INFORMATION; POWER
WINDOWS (XJ-RHD)...............8W-60-2
HELPFUL INFORMATION; TRAILER TOW
(XJ).............................8W-54-1
HELPFUL INFORMATION; TRAILER TOW
(XJ-RHD).........................8W-54-1
HIGH MOUNTED STOP LAMP
(CHMSL)ÐXJ, CENTER................8L-12
HIGH MOUNTED STOP LAMP
(CHMSL)ÐYJ, CENTER................8L-28
HIGH PEDAL EFFORT, HARD PEDAL OR.....5-6
HIGH-BEAM INDICATOR LAMP;
INSTRUMENT CLUSTER (XJ).........8W-40-2
HIGH-BEAM INDICATOR LAMP;
INSTRUMENT CLUSTER (XJ-RHD).....8W-40-2
HIGH-LINE GAUGE CLUSTER (LHD).......8E-9
HIGH-PRESSURE CUT-OFF SWITCH,
LOW-PRESSURE................24-15,24-16
HINGE REPLACEMENTÐXJ, HOOD.......23-10
HINGE/HINGE PIN REPLACEMENTÐXJ,
DOOR.............................23-52
HINGEÐXJ, LIFTGATE.................23-60
HINGEÐYJ, TAILGATE................23-121
HINGESÐYJ, FULL-METAL DOOR.......23-140
HITCH, TRAILER.....................23-77
HITCHÐXJ, TRAILER.................23-77
HOISTING, JUMP STARTING, TOWING......0-9
HOISTING RECOMMENDATIONS..........0-10
HOLD AFTER DRIVING THROUGH DEEP
WATER PUDDLES, BRAKES DO NOT.......5-7
HOLDDOWN AND FLOOR BRACKETSÐ
XJ, SPARE TIRE/WHEEL...............23-98
HONING CYLINDER BORES...............9-2
HOOD ADJUSTMENTÐXJ..............23-10
HOOD ALIGNMENTÐYJ..............23-107
HOOD HINGE REPLACEMENTÐXJ.......23-10
HOOD INSULATOR PANELÐYJ.........23-107
HOOD LATCH REPLACEMENTÐXJ.......23-11
HOOD LATCH STRIKER REPLACEMENTÐ
XJ ................................23-11
HOOD SAFETY LATCHÐYJ............23-109
HOODÐXJ...........................23-7
HOODÐYJ
.........................23-107
HOOK, REAR TOW
.....................13-9
HOOKS, FRONT TOW
..................13-7
HOOKS, TOW
........................13-13
HORN; HORN/CIGAR LIGHTER
...........8E-1HORN; HORN/CIGAR LIGHTER (YJ)....8W-41-1
HORN; INSTRUMENT CLUSTER (XJ) . . . 8W-40-1
HORN CONTACT/CLOCKSPRING..........8G-4
HORN RELAY........................8G-1
HORN REMOVE/INSTALL...............8G-3
HORN SWITCH.......................8G-1
HORN SWITCH REMOVE/INSTALL........8G-3
HORNS.............................8G-1
HOSE REPLACEMENT, PRESSURE AND
RETURN............................19-11
HOSE ROUTING SCHEMATICS, VACUUM . . . 25-2
HOSE SPLASH SHIELDÐXJ VEHICLES,
FUEL FILLER.........................13-4
HOSES, BRAKE FLUIDÐBRAKE
BLEEDINGÐBRAKELINES...............5-10
HOSES, BRAKELINES..................5-12
HOSES, COOLING SYSTEM..............7-32
HOSES/TUBES PRECAUTIONS,
REFRIGERANT.......................24-10
HOSES/TUBING, RUBBER AND PLASTIC....0-26
HOUSING, AIR CLEANER...............14-58
HOUSING COMPONENTSÐYJ,
EVAPORATIVE........................24-6
HOUSING END PLUG..................19-28
HOUSING, EVAPORATOR...............24-35
HOUSING, EVAPORATOR/BLOWER.......24-29
HOUSING, HEATER CORE..............24-33
HOUSING INSPECTION AND PARK LOCK
COMPONENT OVERHAUL, ADAPTER/
EXTENSION........................21-127
HOUSING LEAK DIAGNOSIS,
CONVERTER........................21-75
HOUSING MISALIGNMENT, CLUTCH........6-4
HOUSING REPLACEMENT, CLUTCH.......6-13
HOUSING REPLACEMENT, HEATER.......24-26
HOUSING SEAL REPLACEMENT,
ADAPTER..........................21-191
HOUSINGÐXJ, LIFTGATE LICENSE
PLATE LAMP........................23-65
HOUSINGSÐYJ, INSTRUMENT CLUSTER
AND GAUGE........................23-151
HOW TO USE THIS GROUP; WIRING
DIAGRAMS (XJ)......................8W-1
HOW TO USE THIS GROUP; WIRING
DIAGRAMS (XJ-RHD)..................8W-1
HOW TO USE THIS GROUP; WIRING
DIAGRAMS (YJ)......................8W-1
HUB BEARING AND AXLE SHAFT.........2-25
HYDRAULIC CONTROL UNIT; ANTI-LOCK
BRAKES (XJ)......................8W-32-2
HYDRAULIC CONTROL UNIT; ANTI-LOCK
BRAKES (XJ-RHD).................8W-32-2
HYDRAULIC CONTROL UNIT; ANTI-LOCK
BRAKES (YJ)......................8W-32-2
HYDRAULIC CONTROL UNIT (HCU).......5-33
HYDRAULIC LINKAGE COMPONENTS.......6-1
HYDRAULIC LINKAGE INSTALLATION,
CLUTCH.............................6-14
HYDRAULIC LINKAGE REMOVAL,
CLUTCH.............................6-13
HYDRAULIC PRESSURE TEST.....21-177,21-72
HYDRAULIC SYSTEM................21-169
HYDRAULIC TAPPETS..............9-24,9-66
HYDROSTATIC LOCK
....................9-4
IDENTIFICATION, AW-4 ACCUMULATOR
COMPONENT
.......................21-342
IDENTIFICATION, AW-4 VALVE AND
SPRING
...........................21-343
IDENTIFICATION, BOLT
..............Intro.-14
IDENTIFICATION, CIRCUIT; WIRING
DIAGRAMSÐGENERAL INFORMATION
(XJ)
...............................8W-1
IDENTIFICATION, ENGINE AND
TRANSMISSION/TRANSFER CASE
......Intro.-5
IDENTIFICATION, MAJOR COMPONENT
. . Intro.-5
IDENTIFICATION NUMBER (VIN)
DECODING, VEHICLE
................Intro.-4
IDENTIFICATION NUMBER (VIN) PLATE,
VEHICLE
..........................Intro.-4
IDENTIFICATION, SECTION; WIRING
DIAGRAMS (XJ)
......................8W-1
IDENTIFICATION, SECTION; WIRING
DIAGRAMS (XJ-RHD)
..................8W-1
IDENTIFICATION, SECTION; WIRING
DIAGRAMS (YJ)
......................8W-1
IDENTIFICATION, TRANSFER CASE
.....21-284,
21-307IDENTIFICATION, TRANSMISSION . 21-166,21-33,
21-67,21-2
IDENTIFICATION, WIRE CODE; WIRING
DIAGRAMSÐGENERAL INFORMATION
(XJ)...............................8W-1
IDENTIFICATION/SYSTEM OPERATION,
COMPONENT.........................8D-1
IDLE AIR CONTROL (IAC) MOTOR; FUEL
SYSTEM............................14-62
IDLE AIR CONTROL (IAC) MOTOR;
FUEL/IGNITION (XJ)................8W-30-2
IDLE AIR CONTROL (IAC) MOTOR;
FUEL/IGNITION (YJ)................8W-30-2
IDLE AIR CONTROL (IAC) MOTOR;
FUEL/IGNITION (XJ-RHD)............8W-30-2
IDLE AIR CONTROL (IAC) MOTORÐPCM
OUTPUT............................14-27
IDLE AIR CONTROL MOTOR TEST.......14-49
IDLE SWITCH, EXTENDED...........8W-30-5
IDLE SWITCH TEST, EXTENDED.........14-48
IDLE SWITCHÐPCM INPUT, EXTENDED . . . 14-23
IGNITION CABLES, DISTRIBUTOR CAP
AND ROTOR.........................0-20
IGNITION CIRCUIT SENSEÐPCM INPUT . . 14-23
IGNITION COIL; FUEL SYSTEM..........14-62
IGNITION COIL; FUEL/IGNITION (XJ) . . . 8W-30-2
IGNITION COIL; FUEL/IGNITION (YJ) . . . 8W-30-2
IGNITION COIL; IGNITION SYSTEMS.....8D-22,
8D-4,8D-9
IGNITION COIL; FUEL/IGNITION
(XJ-RHD).........................8W-30-2
IGNITION COIL RESISTANCE............8D-9
IGNITION COILÐPCM OUTPUT..........14-28
IGNITION FEED; FUEL/IGNITION
(XJ-RHD).........................8W-30-1
IGNITION KEY-IN SWITCH..........8U-1,8U-2
IGNITION SECONDARY CIRCUIT
DIAGNOSIS.........................8D-10
IGNITION SWITCH; BRAKES.............5-35
IGNITION SWITCH; FUEL/IGNITION (XJ) . 8W-30-1
IGNITION SWITCH; FUEL/IGNITION (YJ) . 8W-30-1
IGNITION SWITCH; FUEL/IGNITION
(XJ-RHD).........................8W-30-1
IGNITION SWITCH AND KEY CYLINDER
SERVICE...........................8D-26
IGNITION SWITCH CONTINUITY TESTS . . . 8D-30
IGNITION SWITCH LAMP; INTERIOR
LIGHTING (XJ)....................8W-44-1
IGNITION SWITCH LAMP; INTERIOR
LIGHTING (XJ-RHD)................8W-44-1
IGNITION SWITCH SERVICE............19-54
IGNITION SWITCHÐXJ MODELS........8D-26
IGNITION SWITCHÐYJ MODELS........8D-29
IGNITION TIMING....................8D-11
ILLUMINATION LAMPS, CLUSTER . . 8E-16,8E-26,
8E-34,8E-4
ILLUMINATION LAMPS, INSTRUMENT
PANEL; INTERIOR LIGHTING (XJ).....8W-44-1
ILLUMINATION LAMPS, INSTRUMENT
PANEL; INTERIOR LIGHTING (XJ-RHD) . 8W-44-1
ILLUMINATION, RADIO; RADIO (XJ)....8W-47-1
ILLUMINATION, RADIO; RADIO
(XJ-RHD).........................8W-47-1
ILLUMINATION, RADIO; RADIO (YJ)....8W-47-1
ILLUMINATION RELAY CONNECTIONS,
RADIO
..............................8F-4
ILLUMINATION RELAY, RADIO
........8F-1,8F-4
IMPACT SENSOR/INFLATOR ASSEMBLY
. . . 8M-2
INCORRECT FLUID LEVEL, EFFECTS OF
. . . 21-71
INDEX, DIAGRAM; AIR CONDITIONING/
HEATER (XJ)
......................8W-42-2
INDEX, DIAGRAM; AIR CONDITIONING/
HEATER (XJ-RHD)
..................8W-42-2
INDEX, DIAGRAM; AIR CONDITIONING/
HEATER (YJ)
...............8W-42-1,8W-42-2
INDEX, DIAGRAM; ANTI-LOCK BRAKES
(XJ)
.............................8W-32-3
INDEX, DIAGRAM; ANTI-LOCK BRAKES
(XJ-RHD)
.........................8W-32-3
INDEX, DIAGRAM; ANTI-LOCK BRAKES
(YJ)
.............................8W-32-2
INDEX, DIAGRAM; CHARGING SYSTEM
(XJ)
.............................8W-20-1
INDEX, DIAGRAM; CHARGING SYSTEM
(XJ-RHD)
.........................8W-20-1
INDEX, DIAGRAM; CHARGING SYSTEM
(YJ)
.............................8W-20-1
JINDEX 13
Description Group-Page Description Group-Page Description Group-Page

INSTALLATION, DRUM BRAKESHOE.......5-55
INSTALLATION, FRONT WHEEL SENSOR . . . 5-38
INSTALLATION METHODS AND PARTS
USAGE...............................6-4
INSTALLATION (NON-ABS), MASTER
CYLINDER...........................5-16
INSTALLATION, ROTOR.................5-51
INSTALLATION, TRANSFER CASE . 21-288,21-309
INSTALLATION, TRANSMISSION.....21-36,21-5
INSTALLATION, TRANSMISSION AND
CONVERTER.......................21-117
INSTALLATION, TRANSMISSION AND
TORQUE CONVERTER................21-199
INSTALLATION, TRANSMISSION VALVE
BODY.............................21-187
INSTALLATION, VALVE BODY..........21-104
INSTALLATION, WHEEL.................22-6
INSTALLATION, WHEEL CYLINDER........5-58
INSTALLATION (WITH ABS), MASTER
CYLINDER AND COMBINATION VALVE.....5-20
INSTALLATION (XJ), HCU...............5-43
INSTALLATION (XJ MODELS), ECU........5-40
INSTALLATION (XJ), SHIFT LEVER......21-286,
21-309
INSTALLATION (XJ WITH ABS), POWER
BRAKE BOOSTER.....................5-27
INSTALLATION (XJ WITH FULL
CONSOLE), PARKING BRAKE LEVER.......5-64
INSTALLATION (XJ WITH MINI
CONSOLE), PARKING BRAKE LEVER.......5-63
INSTALLATION (XJ WITHOUT ABS),
POWER BRAKE BOOSTER...............5-30
INSTALLATION (XJ WITHOUT CONSOLE),
PARKING BRAKE LEVER................5-65
INSTALLATION (YJ), HCU...............5-44
INSTALLATION (YJ), PARKING BRAKE
PEDAL..............................5-66
INSTALLATION (YJ), POWER BRAKE
BOOSTER............................5-30
INSTALLATION (YJ), SHIFT LEVER......21-286
INSTRUMENT CLUSTER; INSTRUMENT
CLUSTER (XJ).....................8W-40-1
INSTRUMENT CLUSTER; INSTRUMENT
CLUSTER (XJ-RHD)................8W-40-1
INSTRUMENT CLUSTER; INSTRUMENT
CLUSTER (YJ).....................8W-40-1
INSTRUMENT CLUSTER AND GAUGE
HOUSINGSÐYJ.....................23-151
INSTRUMENT CLUSTER BEZELÐXJ......23-80
INSTRUMENT CLUSTER BEZELÐYJ.....23-151
INSTRUMENT CLUSTERS..........8E-24,8E-1
INSTRUMENT PANEL.............8E-24,8E-1
INSTRUMENT PANEL AND GAUGESÐYJ . . 8E-24
INSTRUMENT PANEL COMPONENTSÐYJ . 23-152
INSTRUMENT PANEL ILLUMINATION
LAMPS; INTERIOR LIGHTING (XJ).....8W-44-1
INSTRUMENT PANEL ILLUMINATION
LAMPS; INTERIOR LIGHTING (XJ-RHD) . 8W-44-1
INSTRUMENT PANEL REMOVE/INSTALL . . . 8E-20
INSTRUMENT PANELÐYJ.............23-151
INSULATOR PANELÐXJ, DASH PANEL....23-12
INSULATOR PANELÐYJ, HOOD........23-107
INTAKE AIR TEMPERATURE SENSOR;
FUEL/IGNITION (XJ)................8W-30-4
INTAKE AIR TEMPERATURE SENSOR;
FUEL/IGNITION (YJ)................8W-30-4
INTAKE AIR TEMPERATURE SENSOR;
FUEL/IGNITION (XJ-RHD)............8W-30-4
INTAKE DUCT, FRESH AIR..............24-34
INTAKE MANIFOLD...................14-63
INTAKE MANIFOLD AIR TEMPERATURE
SENSOR; FUEL SYSTEM...............14-60
INTAKE MANIFOLD AIR TEMPERATURE
SENSOR; IGNITION SYSTEMS......8D-23,8D-5
INTAKE MANIFOLD AIR TEMPERATURE
SENSOR TEST; FUEL SYSTEM..........14-46
INTAKE MANIFOLD AIR TEMPERATURE
SENSOR TEST; IGNITION SYSTEMS......8D-11
INTAKE MANIFOLD AIR TEMPERATURE
SENSORÐPCM INPUT................14-22
INTAKE MANIFOLD LEAKAGE DIAGNOSIS . . . 9-5
INTAKE MANIFOLDÐ2.5L ENGINE........11-7
INTAKE MANIFOLDÐ4.0L ENGINE
........11-8
INTERCHANGEABILITY, TRANSMISSION
CHANGES AND PARTS
................21-67
INTERFERENCE, RADIO FREQUENCY
......8F-5
INTERIOR COMPONENTS
........23-151,23-80
INTERIOR LAMPS
...............8L-16,8L-31INTERIOR LAMPSÐXJ................8L-18
INTERIOR LAMPSÐYJ................8L-32
INTERIOR REARVIEW MIRROR
SUPPORT BRACKET REPLACEMENTÐ
XJ ................................23-68
INTERIOR REARVIEW MIRRORÐXJ......23-66
INTERIOR TRIM PANELS AND SCUFF
PLATESÐXJ........................23-84
INTERLOCK CABLE ADJUSTMENT, PARK . 21-195
INTERLOCK CABLE ADJUSTMENT (XJ),
PARK .............................21-101
INTERLOCK MECHANISM, AUTOMATIC
TRANSMISSION SHIFTER/IGNITION......19-55
INTERMEDIATE (COUPLER) SHAFT.......19-45
INTERMEDIATEÐCOUPLING SHAFT......19-23
INTERMITTENT AND POOR
CONNECTIONS; WIRING DIAGRAMSÐ
GENERAL INFORMATION (XJ)...........8W-4
INTERMITTENT WIPE MODULE..........8K-4
INTERMITTENT WIPE SWITCH TESTING . . 8K-15
INTERMITTENT WIPERS; WIPERS
(XJ-RHD).........................8W-53-1
INTERNATIONAL SYMBOLS...............0-1
INTERNATIONAL VEHICLE CONTROL
AND DISPLAY SYMBOLS.............Intro.-5
INTRODUCTION; BODY COMPONENTSÐ
XJ VEHICLES.......................23-158
INTRODUCTION; LUBRICATION AND
MAINTENANCE.....................0-1,0-4
IN-VEHICLE SERVICE, 30RH/32RH.......21-99
IN-VEHICLE SERVICE, AW-4.............21-182
I/P ASH RECEIVER TRAY LAMPÐXJ.....23-80
JACK STORAGEÐXJ..................23-97
JAMB SWITCH, DRIVER'S DOOR.....8U-1,8U-2
JEEP BODY CODE LETTERS..............5-2
JOINT ANGLE MEASUREMENT,
UNIVERSAL..........................16-4
JOINT REPLACEMENT, UNIVERSAL.......16-10
JOINTS, UNIVERSAL...................16-2
JUMP STARTING PROCEDURE............0-9
JUMP STARTING, TOWING AND
HOISTING............................0-9
KEY CYLINDER SERVICE, IGNITION
SWITCH............................8D-26
KEY LOCK CYLINDERÐXJ, DOOR.......23-47
KEY LOCK CYLINDERÐYJ, FULL-METAL
DOOR............................23-139
KEY-IN SWITCH, IGNITION..........8U-1,8U-2
KEYLESS ENTRY MODULE..........8P-1,8P-7
KEYLESS ENTRY MODULE, REMOTE . . . 8W-61-1
KEYLESS ENTRY MODULE REMOVE/
INSTALL...........................8P-10
KEYLESS ENTRY RECEIVER.............8C-1
KEYLESS ENTRY RECEIVERÐXJ........23-93
KEYLESS ENTRY TRANSMITTER . 8P-1,8P-7,8P-8
KEYS ARE NOT AVAILABLE, TOWING
WHEN..............................0-13
KNOCK, LOW SPEED; FRONT
SUSPENSION AND AXLE................2-19
KNOCK, LOW SPEED; REAR
SUSPENSION AND AXLES...............3-10
KNUCKLE AND BALL STUDS, STEERING . . . 2-32
LABEL, VEHICLE EMISSION CONTROL
INFORMATION (VECI)..................25-1
LABEL, VEHICLE SAFETY CERTIFICATION . Intro.-4
LABELS AND PLATESÐXJ, VEHICLE....Intro.-2
LABELS AND PLATESÐYJ, VEHICLE....Intro.-3
LABELS/DECALS/PLATESÐXJ............23-1
LABELS/DECALS/PLATESÐYJ..........23-102
LABELS/PLATES, CODES AND
DIMENSIONS, DESIGNATIONS.........Intro.-1
LAG TEST, TIME....................21-178
LAMP, ABS WARNING; ANTI-LOCK
BRAKES (XJ)......................8W-32-2
LAMP, ABS WARNING; ANTI-LOCK
BRAKES (XJ-RHD).................8W-32-2
LAMP, ABS WARNING; ANTI-LOCK
BRAKES (YJ)......................8W-32-2
LAMP, ABS WARNING; INSTRUMENT
CLUSTER (XJ)
.....................8W-40-2
LAMP, ABS WARNING; INSTRUMENT
CLUSTER (XJ-RHD)
................8W-40-2
LAMP, ABS WARNING; INSTRUMENT
CLUSTER (YJ)
.....................8W-40-2
LAMP, ACCESSORY LAMP AND HEATER
CONTROL PANEL
..................8W-44-1
LAMP ADJUSTMENT USING ALIGNMENT
SCREENÐXJ, HEADLAMP/FOG
...........8L-7LAMP ADJUSTMENT USING ALIGNMENT
SCREENÐYJ, HEADLAMP/FOG..........8L-23
LAMP AND DOME LAMP, CARGO......8W-44-1
LAMP AND HEATER CONTROL PANEL
LAMP, ACCESSORY.................8W-44-1
LAMP, BRAKE WARNING; INSTRUMENT
CLUSTER (XJ).....................8W-40-2
LAMP, BRAKE WARNING; INSTRUMENT
CLUSTER (XJ-RHD)................8W-40-2
LAMP, BRAKE WARNING; INSTRUMENT
CLUSTER (YJ).....................8W-40-2
LAMP BULB REMOVE/INSTALL,
READING/COURTESY..................8C-8
LAMP BULB REPLACEMENTÐXJ,
BACK-UP/REAR TURN SIGNAL/TAIL......8L-12
LAMP BULB REPLACEMENTÐXJ, FRONT
PARK/TURN SIGNAL...................8L-9
LAMP BULB REPLACEMENTÐXJ, SIDE
MARKER...........................8L-10
LAMP BULB REPLACEMENTÐXJ,
UNDERHOOD........................8L-13
LAMP BULB REPLACEMENTÐYJ,
BACK-UP/REAR TURN SIGNAL/TAIL......8L-28
LAMP BULB REPLACEMENTÐYJ, FRONT
PARK/TURN SIGNAL..................8L-25
LAMP BULB REPLACEMENTÐYJ, SIDE
MARKER...........................8L-25
LAMP BULB REPLACEMENTÐYJ,
UNDERHOOD........................8L-29
LAMP BULB REPLACEMENTÐYJ
VEHICLES, HARDTOP DOME/CARGO.....8L-31
LAMP, CARGO LAMP AND DOME;
INTERIOR LIGHTING (XJ-RHD)........8W-44-1
LAMP, CARGO LAMP, COURTESY LAMPS
AND DOME; INTERIOR LIGHTING (XJ) . . 8W-44-1
LAMP, CHARGING SYSTEM INDICATOR;
INSTRUMENT CLUSTER (XJ).........8W-40-3
LAMP (CHMSL)ÐXJ, CENTER HIGH
MOUNTED STOP.....................8L-12
LAMP (CHMSL)ÐYJ, CENTER HIGH
MOUNTED STOP.....................8L-28
LAMP, COURTESY LAMPS AND DOME
LAMP, CARGO; INTERIOR LIGHTING
(XJ).............................8W-44-1
LAMP DIAGNOSIS, FOG...........8L-21,8L-3
LAMP (DRL) MODULE, DAYTIME
RUNNING; FRONT LIGHTING (XJ).....8W-50-2
LAMP (DRL) MODULEÐCANADIAN
VEHICLES ONLY, DAYTIME RUNNING;
FRONT LIGHTING (YJ)..............8W-50-2
LAMP, ENGINE COOLANT TEMPERATURE
WARNING; INSTRUMENT CLUSTER
(XJ).............................8W-40-1
LAMP, ENGINE COOLANT TEMPERATURE
WARNING; INSTRUMENT CLUSTER
(XJ-RHD).........................8W-40-1
LAMP, GLOVE BOX; INTERIOR LIGHTING
(XJ).............................8W-44-1
LAMP, GLOVE BOX; INTERIOR LIGHTING
(XJ-RHD).........................8W-44-1
LAMP, HIGH-BEAM INDICATOR;
INSTRUMENT CLUSTER (XJ).........8W-40-2
LAMP, HIGH-BEAM INDICATOR;
INSTRUMENT CLUSTER (XJ-RHD).....8W-40-2
LAMP HOUSINGÐXJ, LIFTGATE LICENSE
PLATE .............................23-65
LAMP, IGNITION SWITCH; INTERIOR
LIGHTING (XJ)....................8W-44-1
LAMP, IGNITION SWITCH; INTERIOR
LIGHTING (XJ-RHD)................8W-44-1
LAMP, LOW FUEL WARNING;
INSTRUMENT CLUSTER (XJ).........8W-40-1
LAMP, LOW WASHER FLUID WARNING;
INSTRUMENT CLUSTER (XJ).........8W-40-2
LAMP, LOW WASHER FLUID WARNING;
INSTRUMENT CLUSTER (XJ-RHD).....8W-40-2
LAMP, MANUAL TRANSMISSION
UP-SHIFT; INSTRUMENT CLUSTER (XJ) . 8W-40-2
LAMP (MIL), MALFUNCTION INDICATOR;
FUEL/IGNITION (XJ)
................8W-30-5
LAMP (MIL), MALFUNCTION INDICATOR;
FUEL/IGNITION (YJ)
................8W-30-5
LAMP (MIL), MALFUNCTION INDICATOR;
INSTRUMENT CLUSTER (XJ)
.........8W-40-2
LAMP (MIL), MALFUNCTION INDICATOR;
INSTRUMENT CLUSTER (XJ-RHD)
.....8W-40-1
LAMP (MIL), MALFUNCTION INDICATOR;
FUEL/IGNITION (XJ-RHD)
............8W-30-4
JINDEX 15
Description Group-Page Description Group-Page Description Group-Page

SPLICE INDEX; SPLICE INFORMATION
(YJ).............................8W-70-1
SPLICE LOCATIONS; SPLICE LOCATIONS
(XJ).............................8W-95-1
SPLICE LOCATIONS; SPLICE LOCATIONS
(YJ).............................8W-95-1
SPLICE LOCATIONS; WIRING DIAGRAMS
(XJ)...............................8W-1
SPLICE LOCATIONS; WIRING DIAGRAMS
(XJ-RHD)...........................8W-1
SPLICE LOCATIONS; WIRING DIAGRAMS
(YJ)...............................8W-1
SPORT BARÐYJ....................23-132
SPRING AND SHOCK ABSORBER
DIAGNOSIS........................3-3,3-6
SPRING AND SHOCK DIAGNOSIS; FRONT
SUSPENSION AND AXLE............2-13,2-15
SPRING AND SHOCK DIAGNOSIS; REAR
SUSPENSION AND AXLES.............3-3,3-6
SPRING, COIL........................2-14
SPRING EYE BUSHING REPLACEMENT,
LEAF; FRONT SUSPENSION AND AXLE.....2-17
SPRING EYE BUSHING REPLACEMENT,
LEAF; REAR SUSPENSION AND AXLES . . 3-5,3-7
SPRING IDENTIFICATION, AW-4 VALVE . . . 21-343
SPRING, LEAF; FRONT SUSPENSION
AND AXLE...........................2-16
SPRING, LEAF; REAR SUSPENSION AND
AXLES............................3-4,3-7
SPRING REPLACEMENT, VALVE STEM
SEAL...............................9-65
SPRINGS, ACCUMULATOR PISTONS....21-189
SPRINGS AND OIL SEALS, VALVE........9-23
SPRINGS, VALVES AND VALVE.......9-27,9-69
SPROCKETS, TIMING CHAIN.........9-31,9-73
STABILIZER BAR; FRONT SUSPENSION
AND AXLE.......................2-11,2-15
STABILIZER BAR; REAR SUSPENSION
AND AXLES...........................3-5
STALL TEST, CONVERTER..............21-74
STALL TEST, TORQUE CONVERTER.....21-178
STANDARD SERVICE PROCEDURES........9-1
STANDARD WIPERS................8W-53-1
STARTER AND SOLENOID TESTING
SPECIFICATIONS, 2.5L................8A-23
STARTER AND SOLENOID TESTING
SPECIFICATIONS, 4.0L................8A-23
STARTER AND STARTER RELAY..........8B-4
STARTER MOTOR RELAY TEST..........14-51
STARTER NOISE DIAGNOSIS...........8A-16
STARTER NOISE DIAGNOSIS, 2.5L.......8A-16
STARTER RELAY CONNECTIONS.........8A-15
STARTER RELAY REMOVE/INSTALL.......8B-6
STARTER RELAY, STARTER..............8B-4
STARTER REMOVE/INSTALLÐ2.5L........8B-4
STARTER REMOVE/INSTALLÐ4.0L........8B-5
STARTER SPECIFICATIONS..............8B-8
STARTING PROCEDURE, JUMP............0-9
STARTING SYSTEM; BATTERY/
STARTING/CHARGING SYSTEMS
DIAGNOSTICS.......................8A-11
STARTING SYSTEM; STARTING SYSTEM
(XJ).............................8W-21-1
STARTING SYSTEM; STARTING SYSTEM
(XJ-RHD).........................8W-21-1
STARTING SYSTEM; STARTING SYSTEM
(YJ)
.............................8W-21-1
STARTING SYSTEM COLD CRANKING
SPECIFICATIONS, 2.5L
................8A-23
STARTING SYSTEM COLD CRANKING
SPECIFICATIONS, 4.0L
................8A-23
STARTING SYSTEM DIAGNOSIS
.........8A-12
STARTING SYSTEM SPECIFICATIONS
.....8A-23
STARTING, TOWING AND HOISTING,
JUMP
................................0-9
STATEMENTÐGAS ENGINES, FUEL
USAGE
..............................0-19
STATIONARY GLASS
.................23-144
STATIONARY GLASS WATER LEAK
DETECTION AND REPAIRÐXJ
..........23-76
STATIONARY GLASS WATER LEAK
DETECTION AND REPAIRÐYJ
.........23-150
STATIONARY WINDOW GLASS
..........23-66
STATIONARY WINDOW GLASSÐXJ,
REAR DOOR
........................23-46
STATOR CLUTCH INSPECTION, TORQUE
CONVERTER
.......................21-199STEERING COLUMN GENERAL
SERVICEÐXJ.......................19-47
STEERING COLUMN, NON-TILT..........19-60
STEERING COLUMN, TILT..............19-66
STEERING COLUMNÐXJ..............19-78
STEERING COLUMNÐYJ.........19-58,19-78
STEERING DAMPER.............19-17,19-20
STEERING GEAR ADJUSTMENTS........19-24
STEERING GEAR, MANUAL;
LUBRICATION AND MAINTENANCE........0-30
STEERING GEAR, MANUAL; STEERING . . . 19-37,
19-78
STEERING GEAR, POWER..............19-78
STEERING GEAR, RECIRCULATING BALL
POWER............................19-21
STEERING GEAR REPLACEMENT . . . 19-23,19-45
STEERING GEAR SPECIFICATIONS,
MANUAL...........................19-46
STEERING GEAR SPECIFICATIONS,
POWER............................19-36
STEERING GEARS, RECIRCULATING-
BALL POWER.......................19-74
STEERING KNUCKLE AND BALL STUDS....2-32
STEERING LINKAGE...................0-28
STEERING LINKAGEÐXJ.........19-16,19-78
STEERING LINKAGEÐYJ.........19-19,19-78
STEERING PRESSURE SWITCH, POWER;
FUEL/IGNITION (XJ)................8W-30-5
STEERING PRESSURE SWITCH, POWER;
FUEL/IGNITION (YJ)..................8W-30-4
STEERING PRESSURE SWITCHÐ2.5L
ENGINE ONLY, POWER................14-63
STEERING PRESSURE SWITCHÐPCM
INPUT, POWER......................14-24
STEERING PUMP, POWER....19-11,19-74,19-78
STEERING PUMPÐINITIAL OPERATION,
POWER............................19-15
STEERING RHD......................19-74
STEERING SYSTEM COMPONENTS........19-1
STEERING SYSTEM DIAGNOSIS,
MANUAL...........................19-38
STEERING SYSTEM DIAGNOSIS, POWER . . 19-3,
19-4,19-5,19-6,19-7,19-8,19-9
STEERING SYSTEM DIAGNOSIS,
SUSPENSION..........................2-7
STEERING SYSTEM, POWER.............0-29
STEERING WHEEL...............19-49,19-58
STEM SEAL AND SPRING
REPLACEMENT, VALVE.................9-65
STEP MOLDINGÐYJ, BODY SIDE.......23-115
STOP LAMP (CHMSL)ÐXJ, CENTER
HIGH MOUNTED.....................8L-12
STOP LAMP (CHMSL)ÐYJ, CENTER
HIGH MOUNTED.....................8L-28
STOP LAMP RELAY; TRAILER TOW (XJ) . 8W-54-1
STOP LAMP RELAY; TRAILER TOW
(XJ-RHD).........................8W-54-1
STOP LAMP SWITCH..............8H-1,8H-6
STOP LAMPS AND CHMSL LAMPS;
REAR LIGHTING (XJ)...............8W-51-1
STOP LAMPS AND CHMSL LAMPS;
REAR LIGHTING (XJ-RHD)...........8W-51-1
STOP LAMPS AND CHMSL LAMPS;
REAR LIGHTING (YJ)...............8W-51-1
STORAGE BIN REMOVE/INSTALL,
SUNGLASSES........................8C-7
STORAGE, REMOTE GARAGE DOOR
OPENER............................8C-1
STORAGE, SUNGLASSES...............8C-1
STORAGEÐXJ, JACK.................23-97
STRAIGHTENING, FRAME..............13-13
STRAP, FUEL TANK SUPPORT............13-4
STRENGTH, BOLT..................Intro.-15
STRIKER AND BUMPERÐXJ, REAR
SEATBACK LATCH....................23-84
STRIKER REPLACEMENTÐXJ, HOOD
LATCH .............................23-11
STRIKER REPLACEMENTÐXJ, SAFETY
LATCH .............................23-11
STRIKERÐYJ, HALF-METAL DOOR
LATCH ............................23-135
STRIKERÐYJ, TAILGATE LATCH
........23-123
STRIPES/DECALSÐXJ, BODY
...........23-21
STRIPES/DECALSÐYJ, BODY
..........23-116
STRIPÐXJ, DOOR EDGE GUARD/EDGE
PROTECTOR
........................23-54
STUD REPLACEMENTÐXJ, LIFTGATE
SUPPORT ROD BALL
.................23-63STUDS, STEERING KNUCKLE AND BALL . . . 2-32
SUN GEAR AND NO. 1 ONE-WAY
CLUTCH OVERHAUL.................21-238
SUNGLASSES STORAGE................8C-1
SUNGLASSES STORAGE BIN REMOVE/
INSTALL............................8C-7
SUNVISORSÐXJ.....................23-93
SUNVISORSÐYJ....................23-155
SUPPLY TEST, VACUUM................8H-6
SUPPORT BRACKET REPLACEMENTÐXJ,
INTERIOR REARVIEW MIRROR..........23-68
SUPPORT CROSSMEMBERÐXJ,
RADIATOR...........................23-6
SUPPORT OVERHAUL, OVERDRIVE.....21-226
SUPPORT OVERHAUL, OVERRUNNING
CLUTCHÐLOW-REVERSE DRUMÐ
REAR.............................21-125
SUPPORT PLATE REPLACEMENT.........5-58
SUPPORT ROD BALL STUD
REPLACEMENTÐXJ, LIFTGATE..........23-63
SUPPORT ROD CYLINDER DISPOSALÐ
XJ, LIFTGATE........................23-63
SUPPORT ROD CYLINDERÐXJ,
LIFTGATE...........................23-62
SUPPORT STRAP, FUEL TANK............13-4
SUPPORTS, ENGINE...................0-21
SUPPRESSION, RADIO NOISE............8F-2
SURFACE TOUCH-UP, PAINTED.........23-158
SUSPENSION AND STEERING SYSTEM
DIAGNOSIS...........................2-7
SUSPENSION ARM, LOWER.............2-13
SUSPENSION ARM, UPPER.............2-12
SUSPENSION COMPONENTS.............3-1
SUSPENSION COMPONENTS, XJ FRONT . . . 2-49
SUSPENSION COMPONENTS, XJ REAR....3-51
SUSPENSION COMPONENTS, YJ FRONT . . . 2-49
SUSPENSION COMPONENTS, YJ REAR....3-51
SUSPENSION, FRONT...................2-1
SUSPENSION, XJ......................3-3
SUSPENSION, XJ FRONT...............2-11
SUSPENSION, YJ......................3-6
SUSPENSION, YJ FRONT...............2-15
SWITCH - XJ, MULTI-FUNCTION..........8J-4
SWITCH, ACCELERATION; ANTI-LOCK
BRAKES (XJ)......................8W-32-1
SWITCH, ACCELERATION; ANTI-LOCK
BRAKES (XJ-RHD).................8W-32-1
SWITCH, ACCELERATION; ANTI-LOCK
BRAKES (YJ)......................8W-32-1
SWITCH, ACCELERATION; BRAKES........5-35
SWITCH ADJUSTMENT, BRAKELIGHT......5-32
SWITCH AND KEY CYLINDER SERVICE,
IGNITION...........................8D-26
SWITCH AND PLUG LOCATIONS,
TRANSMISSION......................21-34
SWITCH, BLOWER MOTOR.............24-16
SWITCH, BRAKE.....................14-59
SWITCH CONTINUITY (LEFT POSITION),
POWER MIRROR......................8T-3
SWITCH CONTINUITY, POWER SEAT......8R-2
SWITCH CONTINUITY (RIGHT
POSITION), POWER MIRROR............8T-3
SWITCH CONTINUITY TESTS, IGNITION . . . 8D-30
SWITCH, DEFOGGER..............8N-1,8N-3
SWITCH, DRIVER'S DOOR JAMB.....8U-1,8U-2
SWITCH, DRIVER'S SEAT BELT......8U-1,8U-3
SWITCH, EXTENDED IDLE...........8W-30-5
SWITCH, FIN SENSING CYCLING
CLUTCH.......................24-15,24-31
SWITCH, FOUR-WHEEL DRIVE (4WD);
INSTRUMENT CLUSTER (XJ-RHD).....8W-40-2
SWITCH, FOUR-WHEEL DRIVE (4WD);
TRANSMISSION CONTROLS (XJ-RHD) . . 8W-31-1
SWITCH, HORN.......................8G-1
SWITCH, IGNITION; BRAKES.............5-35
SWITCH, IGNITION; FUEL/IGNITION (XJ) . 8W-30-1
SWITCH, IGNITION; FUEL/IGNITION (YJ) . 8W-30-1
SWITCH, IGNITION; FUEL/IGNITION
(XJ-RHD).........................8W-30-1
SWITCH, IGNITION KEY-IN
..........8U-1,8U-2
SWITCH INPUT, BRAKE; ANTI-LOCK
BRAKES (XJ)
......................8W-32-2
SWITCH INPUT, BRAKE; ANTI-LOCK
BRAKES (XJ-RHD)
.................8W-32-2
SWITCH INPUT, BRAKE; ANTI-LOCK
BRAKES (YJ)
......................8W-32-2
SWITCH INPUT, BRAKE; FUEL/IGNITION
(XJ)
.............................8W-30-5
JINDEX 27
Description Group-Page Description Group-Page Description Group-Page