JEEP CHEROKEE 1994 Service Repair Manual

DIAGNOSING REAR WIPER/WASHER
Refer to Group 8W - Wiring Diagrams.
(1) Turn ignition switch to ON and rear wiper/
washer switch to WASH.
²Measure voltage at switch connector terminal P.
Meter should read battery voltage. If not, check 20
amp, fuse #1.
²Measure voltage at switch connector terminal B.
Meter should read battery voltage. If not, replace
switch.
²Measure voltage at switch connector terminal A.
Meter should read battery voltage. If not, replace
switch.
(2) Turn ignition switch to ON and unplug rear
washer pump connector.
²Measure resistance at pump connector black wire
to ground. Meter should read zero ohms (ignition
OFF). If not, repair open to ground.
²Measure voltage at pump connector brown/white
wire, switch in WASH. Meter should read battery
voltage. If OK, replace pump. If not, check wiring.
(3) Turn ignition switch to ON, unplug rear wiper
motor connector and place wiper switch in WIPE.
²Measure resistance at motor connector terminal B
to ground. Meter should read zero ohms. If not, re-
pair open to ground.
²Measure voltage at motor connector terminal A.
Meter should read battery voltage. If not, check wir-
ing to fuse.
²Measure voltage at motor connector terminal C.
Meter should read battery voltage. If OK, replace
motor. If not, repair open to switch.
REAR WIPER/WASHER SWITCH TESTING
Fig. 15 Rear Wiper Motor
8K - 14 WINDSHIELD WIPERSJ

WIPER CONTROL SWITCH REPLACEMENT
(1) Disconnect negative cable from battery.
(2) Remove horn button with a push and turn mo-
tion.
(3) Remove horn button components (Fig. 1).
(4) Turn ignition switch to the LOCK position and
remove the steering wheel nut and washer.
(5) Scribe an alignment mark on the steering in
line with the mark already existing on the end of the
steering column.
(6) Remove vibration damper from the steering col-
umn hub, if equipped.
(7) Remove steering wheel using a steering wheel
puller. DO NOT hammer on puller or end of steering
shaft.
WARNING: TO REMOVE THE STEERING SHAFT
SNAP RING IN THE FOLLOWING STEP, THE LOCK-
PLATE MUST BE COMPRESSED. DO NOT AT-
TEMPT TO REMOVE THE LOCKPLATE WITHOUT
COMPRESSOR TOOL C4156 AS THE LOCKPLATE
IS UNDER HEAVY SPRING TENSION.
(8) Compress lockplate with compressor tool
C4156.
(9) Remove steering shaft snap ring (Fig. 2). Dis-
card snap ring. It is not reusable.
(10) Remove compressor tool.
(11) Remove lockplate, cancelling cam, and upper
bearing preload spring.
(12) Remove horn button components from cancel-
ing cam.(13) Remove screw and hazard warning switch
knob.
(14) Remove dimmer switch actuator arm attach-
ing screw (Fig. 3).
(15) Remove turn/hazard switch attaching screws
(Fig. 3).
(16)XJRemove lower instrument panel cover trim
panel.
Fig. 1 Steering Wheel Removal/Installation
Fig. 2 Lockplate Removal
Fig. 3 Turn/Hazard Switch And Dimmer Actuating
Arm Screws
JWINDSHIELD WIPERS 8K - 15

(17)YJ
(a) Remove 6 shroud screws (Fig. 4).
(b) Slide shroud toward steering wheel.
(18) Remove cover under column.
(19) If vehicle is equipped with a column shift, re-
move PRNDL cable clip (Fig. 5).
(20) Remove 2 nuts holding steering column
bracket to brake sled (Fig. 6).
(21) Remove 4 bolts holding steering column brace
to column.(22) Loosen column brace mounting nut at drivers
side kick panel. This will allow column to drop.
(23) Unplug wiper switch connector.
(24) Tape connector to wires (Fig. 7).
Fig. 4 Instrument Shroud Removal/InstallationÐYJ
Fig. 5 PRNDL Cable Clip Removal/Installation
Fig. 6 Lower Steering Column Mounting
Fig. 7 Tape Wiper Switch Connector
8K - 16 WINDSHIELD WIPERSJ

(25) Push turn/hazard connector up and out of
steering column connector (Fig. 8).
(26) Pry up locking tabs of steering column connec-
tor and remove connector from column bracket.
(27) Remove plastic harness cover by pulling it up
and over weld nuts then open and slide the cover off
harness (Fig. 9).
(28) Pull turn/hazard switch out of column far
enough to allow access to remaining screws.(29) Insert ignition key in lock cylinder and turn
ignition switch to ON position.
(30) Remove key warning buzzer switch and re-
taining clip with a paper clip inserted below retainer
so that retainer is flattened (Fig. 10).
Do not attempt to remove buzzer switch and
clip separately. The clip could fall into the col-
umn jacket.
(31) Remove ignition lock cylinder retaining screw
and pull lock cylinder out of column housing (Fig. 11).
Fig. 8 Turn/Hazard Switch And Steering Column
Connectors
Fig. 9 Remove Plastic Harness Cover
Fig. 10 Buzzer Switch Removal
Fig. 11 Lock Cylinder Removal/Installation
JWINDSHIELD WIPERS 8K - 17

(32) Remove screws that attach housing and
shroud assembly to column jacket and carefully re-
move housing and shroud assembly (Fig. 12).
DO NOT let dimmer switch rod, lock pin or
lock rack fall out.
(33) Remove turn/hazard/wiper lever by pulling it
straight out of column.
(34) Remove wiper switch cover from back of hous-
ing and shroud assembly (Fig. 13). If equipped with
column shift, remove screw holding the cover on.
(35) Remove pivot screw from housing and remove
wiper switch.
(36) Install a new switch and switch cover.
(37) Push on dimmer switch rod to make sure it is
connected then carefully position housing and shroud
assembly to column (Fig. 14).
Make sure nylon spring retainer on lock pin is
positioned forward of the retaining slot of lock
rack (Fig. 14).
Position first tooth of gear (farthest from the
block tooth) with the most forward tooth of lock
rack.
(38) Install screws that attach housing and shroud
assembly to column jacket and carefully mate hous-
ing and shroud assembly.
(39) Insert key and lock cylinder and test that lock
pin extends fully when key is moved to lock position.
(40) To install remaining parts, reverse removal
procedures.CAUTION: When installing a wiper switch, make
sure wires are laying flat on bottom inside of col-
umn.
On vehicles equipped with column shift, install
PRNDL cable clip with shift indicator on N (neu-
tral). Move selector through the range and make
sure it lines up with each letter.
(41) Install steering wheel. Tighten steering wheel
nut to 34 Nzm (25 ft. lbs.) torque.
Fig. 12 Steering Column Housing
Removal/Installation
Fig. 13 Remove Pivot Screw
Fig. 14 Check Dimmer Switch Rod and Lock Pin
8K - 18 WINDSHIELD WIPERSJ

WIPER SWITCH TESTING
STANDARD WIPER WASHER
JWINDSHIELD WIPERS 8K - 19

INTERMITTENT WIPER WASHER
8K - 20 WINDSHIELD WIPERSJ

LAMPS
CONTENTS
page page
EXTERIOR LAMPS....................... 1
INTERIOR LAMPS...................... 19SPECIFICATIONS....................... 23
EXTERIOR LAMPS
INDEX
page page
Back-up/Rear Turn Signal/Tail Lamp Bulb
Replacement........................... 9
Center High Mounted Stop Lamp (CHMSL)ÐXJ . 10
Center High Mounted Stop Lamp (CHMSL)ÐYJ . 11
Daytime Running Lights (Canada Only)........ 16
DRL Module Replacement.................. 16
Fog Lamp Beam Adjustment................ 12
Fog Lamp Bulb/Element Replacement......... 13
Fog Lamp Replacement................... 15
Fog Lamp Service Information............... 12
Fog Lamp Switch Replacement.............. 14
Fog Lamp Trouble Diagnosis................ 12
Front Park/Turn Signal Lamp Bulb Replacement . . 8
Headlamp Beam Adjustment................. 3
Headlamp Bulb Replacement................ 3
Headlamp Delay Function Trouble DiagnosisÐXJ
Vehicles.............................. 16Headlamp Delay Module ReplacementÐXJ
Vehicles.............................. 16
Headlamp Dimmer Switch Replacement........ 6
Headlamp Switch Replacement............... 4
Headlamp Trouble DiagnosisÐXJ Vehicles...... 1
Headlamp Trouble DiagnosisÐYJ Vehicles...... 2
License Plate Lamp....................... 10
Sentinel Headlamp Delay ModuleÐXJ Vehicles . . 15
Service Information........................ 1
Side Marker Lamp Bulb Replacement.......... 7
Switch Tests............................. 2
Underhood Lamp Bulb Replacement.......... 18
Underhood Lamp Replacement.............. 18
Underhood Lamp Service Information......... 17
SERVICE INFORMATION
Exterior lamp circuits are comprised of the head-
lamp circuit, fog lamp circuit, and tail/side marker/
park lamp circuit. Battery voltage is controlled by
both the headlamp ON/OFF switch and headlamp
dimmer switch.
The dimmer switch functions as a fog lamp switch.
Voltage is applied to the fog lamp switch only when
the dimmer switch is in the low beam position.
HEADLAMP TROUBLE DIAGNOSISÐXJ VEHICLES
LOW AND HIGH BEAM INOPERATIVE BOTH
HEADLAMPS
(1) Place the headlamp switch in the ON position.
(2) Test the 40 amp fuse for continuity. If bad, re-
place fuse.
(3) Insert the test probe into terminal 5 of the
front lamp wire harness connector. Measure the re-
sistance from terminal 5 to body ground. The ohm-
meter should indicate zero ohms. If not OK, repair
the open circuit in the harness to body ground.(4) Disconnect the front lamp wire connector. Mea-
sure resistance between connector terminals 5 and 2.
Next measure between terminal 5 and 7. The ohm-
meter should indicate zero ohms for both measure-
ments. If not OK, replace the headlamp bulbs.
(5) Measure the voltage between the dimmer
switch wire connector terminal 2 and body ground.
The voltmeter should indicate battery voltage. If not
OK, continue with the next step.
The dimmer switch is integral with the turn
signal and is located on the steering column.
The dimmer switch switches the headlamp beam
when the turn signal lever is pulled rearward.
(6) Disconnect the dimmer switch wire connector
and place the headlamp switch in the OFF position.
Measure the resistance from terminal 2 to vehicle
body ground. The ohmmeter should indicate infinite
resistance. If OK, replace the headlamp switch and
continue with the next step. If not OK, repair the
short circuit in the wire harness that leads to termi-
nal 2.
JLAMPS 8L - 1

(7) Measure the resistance from the dimmer switch
wire harness connector terminal 1 to vehicle body
ground. The ohmmeter should indicate zero ohms. If
OK, continue with the next step. If not OK, repair
the short circuit in the wire harness that leads to
terminal 1.
(8) Measure the resistance from the dimmer switch
wire harness connector terminal 3 to vehicle body
ground. The ohmmeter should indicate zero ohms. If
OK, test the dimmer switch. Replace, if defective.
Connect the wire harness connector to the dimmer
switch. If not defective, repair the short circuit in the
wire harness that leads to terminal 3.
LOW OR HIGH BEAM INOPERATIVE BOTH
HEADLAMPS
(1) Place the headlamp switch in the OFF position.
Disconnect the dimmer switch wire harness connec-
tor.
(2) Measure the resistance from the dimmer switch
connector terminal 1 to body ground. The ohmmeter
should indicate zero ohms. If not OK, repair the open
circuit in the wire harness that leads to the head-
lamp bulbs.
(3) Measure the resistance from the dimmer switch
connector terminal 3 to vehicle body ground. The
ohmmeter should indicate zero ohms. If OK, replace
the dimmer switch. If not OK, repair the open circuit
in the wire harness that leads to headlamp bulbs.
HEADLAMP TROUBLE DIAGNOSISÐYJ VEHICLES
(1) Place the headlamp switch in the ON position.
(2) Place the headlamp dimmer switch in the
HIGH or LOW position.
(3) Disconnect the wire harness connectors from
the headlamp bulbs.
(4) If applicable, measure voltage between each
headlamp bulb wire connector terminal B and vehi-
cle body ground. The voltmeter should indicate bat-
tery voltage. If not OK, repair the open circuit in
wire harness between connector and dimmer switch.
(5) If applicable, measure the voltage between each
headlamp bulb connector terminal C and body
ground. The voltmeter should indicate battery volt-
age. If not OK, repair the open circuit in the wire
harness between the connector and the dimmer
switch.
(6) Measure the resistance from each headlamp
bulb connector terminal A to body ground. The ohm-
meter should indicate zero ohms. If not OK, repair
the open circuit in the wire harness between the con-
nectors and vehicle body ground.
SWITCH TESTS
HEADLAMPÐALL VEHICLES
(1) Refer to the applicable wiring diagram for ter-
minal reference.(2) Place the headlamp switch in the ON position.
(3) Measure the voltage between the headlamp
switch connector voltage supply terminal and vehicle
body ground. The voltmeter should indicate battery
voltage. If not OK, repair the open circuit in the wire
harness between the fuse and the switch connector
terminal.
(4) Measure the voltage between the headlamp
switch connector battery voltage OUT terminal and
vehicle body ground. The voltmeter should indicate
battery voltage. If not OK, replace the headlamp
switch.
DIMMER SWITCHÐALL VEHICLES
(1) Place the headlamp switch in the ON position.
Place the dimmer switch in the HIGH or LOW beam
position, as applicable.
(2) Measure the voltage between the dimmer
switch connector voltage supply terminal and vehicle
body ground. The voltmeter should indicate battery
voltage. If not OK, repair the open circuit in the wire
harness between the headlamp switch and the dim-
mer switch.
(3) Place the dimmer switch in the LOW beam po-
sition. Measure the voltage between the dimmer
switch connector low beam voltage OUT terminal
and body ground. The voltmeter should indicate bat-
tery voltage. If not OK, replace the dimmer switch.
(4) Place the dimmer switch in the HIGH beam po-
sition. Measure the voltage between the dimmer
switch connector high beam voltage OUT terminal
and body ground. Voltmeter should indicate battery
voltage. If not OK, replace dimmer switch.
Fig. 1 Headlamp Dimmer Switch Terminals
8L - 2 LAMPSJ

HEADLAMP BULB REPLACEMENT
REMOVAL
(1) Remove the screws and the headlamp bezel
(Figs. 2 and 3).
(2) Remove the screws and headlamp bulb retain-
ing ring.
(3) Disconnect the headlamp bulb wire harness
connector and remove the bulb from the bucket.
INSTALLATION
(1) Position the bulb in the bucket and connect the
wire harness connector.
(2) Position retaining ring on the headlamp bulb
and install screws.
(3) Install the headlamp bezel. Tighten the screws
securely.
HEADLAMP BEAM ADJUSTMENT
SERVICE INFORMATION
The following headlamp beam adjustment proce-
dures apply to all Jeeptvehicles. The headlamp
beam must be adjusted with the headlamps on LOW
beam. The headlamp beam can be adjusted either
with the use of mechanical headlamp aimers or by
the use of an aiming screen (Fig. 4).
ADJUSTMENT WITH MECHANICAL AIMERS
Use Headlamp Aimer C-4466-A (J25300-A) and fol-
low instructions supplied with equipment.
Adjust headlamps so that the beam horizontal po-
sition is at 0 and beam vertical position is 25 mm (1
in) downward.
ADJUSTMENT WITH AIMING SCREEN
PREPARATION
When an aiming screen is to be used for headlamp
aim adjustment, use following procedure.
(1) Position the vehicle in dark area with a level
floor and with a screen (wall) that has a white sur-
face.
(2) Refer to Figure 4. Mark a reference line (2) on
the floor 7.62 meters (25 feet) away from and parallel
to the screen/wall (1).
Fig. 2 Headlamp ComponentsÐXJ Vehicles
Fig. 3 Headlamp ComponentsÐYJ Vehicles
Fig. 4 Headlamp ``Aiming'' Screen
JLAMPS 8L - 3