clock JEEP CHEROKEE 1995 Service User Guide

IGNITION SWITCHÐXJ MODELS
IGNITION SWITCH AND KEY CYLINDER SERVICE
The ignition switch is located on the steering col-
umn. The Key-In-Switch and Halo Light are integral
with the ignition switch. Refer to Group 8U for Key-
In-Switch and Halo Light diagnosis for XJ models.
Refer to Group 8W, Wiring for ignition switch wir-
ing circuits.
REMOVAL
(1) Disconnect negative battery cable from battery.
(2) If vehicle has a tilt column, remove tilt lever by
turning it counterclockwise.
(3) Remove upper and lower covers from steering
column (Fig. 1).
(4) Remove ignition switch mounting screws. Use
tamper proof torx bit Snap-on TTXR20A2 or equiva-
lent to remove the screws (Fig. 2 or 3).
(5) Gently pull switch away from column. Release
connector locks on 7-terminal wiring connector, then
remove connector from ignition switch.
(6) Release connector lock on 4-terminal connector,
then remove connector from ignition switch (Fig. 4).
(7) To remove key cylinder from ignition switch:
(a) Insert key in ignition switch. Turn key to
LOCK position. Using a TTXR20A2 or equivalent
torx bit, remove key cylinder retaining screw and
bracket (Fig. 5 or 6).
(b) Rotate key clockwise to the OFF position.
Key cylinder will unseat from ignition switch (Fig.
7). When key cylinder is unseated, it will be ap-proximately 1/8 inch away from ignition switch
halo light ring.Do not attempt to remove key
cylinder at this time.
(c) With key cylinder in unseated position, rotate
key counterclockwise to the lock position and re-
move key.
(d) Remove key cylinder from ignition switch
(Fig. 8).
Fig. 1 Shroud Removal/InstallationÐTypical
Fig. 2 Ignition Switch Screw Removal
Fig. 3 Ignition Switch Screw Removal
8D - 26 IGNITION SYSTEMSJ

HEADLAMP HIGH BEAM INDICATOR LAMP
The high beam indicator lamp is controlled by the
headlamp dimmer (multi-function) switch. One side
of the indicator bulb is grounded at all times. The
other side of the bulb receives battery feed through
the contacts of the dimmer switch when the multi-
function switch stalk is actuated to turn the head-
lamp high beams on. Refer to Group 8L - Lamps for
more information.
LOW FUEL WARNING LAMP
A Light-Emitting Diode (LED) on the face of the
fuel gauge will light when the fuel level falls below
approximately 4 gallons. A low fuel warning module
attached to the rear of the fuel gauge controls when
the LED will light. When the module senses 66.5
ohms or more resistance from the fuel level sending
unit for 10 continuous seconds, the LED will light.
When the module senses 63.5 ohms or less resistance
from the fuel level sending unit for 20 continuous
seconds, the LED is turned off.
LOW OIL PRESSURE WARNING LAMP
The low oil pressure warning lamp lights with the
ignition switch in the ON position and the engine not
running. The lamp should be off when the engine is
running. Battery voltage is supplied to one side of
the indicator bulb when the ignition switch is turned
ON. The warning lamp side of the combination oil
pressure sending unit is connected to the other side
of the bulb. When normal engine oil pressure is ap-
plied to the sending unit, resistance on the warning
lamp side is high and the lamp goes off. When engine
oil pressure is too low, resistance on the warning
lamp side of the sending unit is low, which causes
the bulb to light.
LOW WASHER FLUID WARNING LAMP
The low washer fluid warning lamp indicates when
the fluid level in the washer reservoir is too low. The
washer fluid level sensor uses a float in the reservoir
to monitor fluid level. The action of the float opens or
closes the switch within the sensor that provides ig-
nition-switched battery voltage to the lamp bulb. Re-
fer to Group 8K - Wiper and Washer Systems for
more information.
MALFUNCTION INDICATOR LAMP
The CHECK ENGINE or Malfunction Indicator
Lamp (MIL) lights each time the ignition switch is
turned ON, and stays on for 3 seconds as a bulb test.
If the Powertrain Control Module (PCM) receives an
incorrect signal or no signal from certain fuel oremission system related circuits or components, the
lamp is turned on. This will indicate that the PCM
has recorded a Diagnostic Trouble Code (DTC) in
electronic memory for a circuit or component mal-
function. Refer to Group 14 - Fuel System for more
information.
SEAT BELT REMINDER LAMP
The seat belt reminder lamp lights for 4 to 8 sec-
onds after the ignition switch is turned to the ON po-
sition. A timer in the chime/buzzer module controls
ignition-switched battery feed to the lamp. Refer to
Group 8U - Chime/Buzzer Warning Systems for more
information.
TURN SIGNAL INDICATOR LAMPS
The left and right turn signal indicator lamps are
controlled by the turn signal and hazard warning
(multi-function) switches. One side of the bulb for
each lamp is grounded at all times. The other side of
the bulb receives battery feed through the contacts of
the multi-function switch when the turn signal lever
(multi-function switch stalk) or hazard warning but-
ton are actuated. Refer to Group 8J - Turn Signal
and Hazard Warning Systems for more information.
UPSHIFT INDICATOR LAMP
Vehicles equipped with manual transmissions have
an optional upshift indicator lamp. Ground feed for
the lamp is switched by the Powertrain Control Mod-
ule (PCM). The lamp lights to indicate when the
driver should shift to the next highest gear for best
fuel economy. The PCM will turn the lamp off after 3
to 5 seconds if the upshift is not performed. The lamp
will remain off until the vehicle stops accelerating
and is brought back to the range of lamp operation,
or until the transmission is shifted into another gear.
The indicator lamp is normally on when the igni-
tion switch is turned ON and is turned off when the
engine is started. The lamp will be turned on during
vehicle operation according to engine speed and load.
CLUSTER ILLUMINATION LAMPS
All cluster illumination lamps receive battery feed
from the instrument lamps fuse in the fuseblock
module through the panel dimmer rheostat of the
headlamp switch. When the park or headlamps are
on, the cluster illumination lamps light. Illumination
brightness can be adjusted by rotating the headlamp
switch knob (clockwise to dim, counterclockwise to
brighten).
8E - 4 INSTRUMENT PANEL AND GAUGESÐXJJ

CLUSTER ILLUMINATION LAMPS
(1) Check fuse 19 (fuse 25 - RHD) in fuseblock
module. If OK, go to next step. If not OK, replace
fuse.
(2) Turn park lamps on at headlamp switch. Rotate
headlamp switch knob counterclockwise to just before
interior lamps detent. Check for battery voltage at
fuse 19 (fuse 25 - RHD) in fuseblock module. Rotate
headlamp switch clockwise while observing test volt-
meter. Reading should go from battery voltage to zero
volts. If OK, go to next step. If not OK, repair open
circuit to headlamp switch or refer to Group 8L -
Lamps to diagnose headlamp switch.
(3) Disconnect battery negative cable. Remove in-
strument cluster bezel and cluster assembly. Unplug
cluster connector A. Connect battery negative cable.Turn park lamps on at headlamp switch. Rotate
headlamp switch knob counterclockwise to just before
interior lamps detent. Check for battery voltage at
cavity A7 (cavity A6 - RHD) of cluster connector A. If
OK, go to next step. If not OK, repair open circuit to
fuse as required.
(4) Turn park lamps off. Disconnect battery nega-
tive cable. Remove fuse 19 (fuse 25 - RHD) from fuse-
block module. Probe cavity A7 (cavity A6 - RHD) of
cluster connector A. Check for continuity to a good
ground. There should be no continuity. If OK, go to
next step. If not OK, repair short circuit as required.
(5) Probe cavity A3 of cluster connector A. Check
for continuity to ground. There should be continuity.
If not OK, repair open circuit as required.
8E - 16 INSTRUMENT PANEL AND GAUGESÐXJJ

AUDIO SYSTEMS
CONTENTS
page page
DIAGNOSIS............................. 2
GENERAL INFORMATION.................. 1SERVICE PROCEDURES................... 6
GENERAL INFORMATION
Following are general descriptions of major compo-
nents used in XJ (Cherokee)/YJ (Wrangler) audio sys-
tems. Refer to Group 8W - Wiring Diagrams for
complete circuit descriptions and diagrams.
RADIOS
Radio options for the XJ and YJ models include an
AM/FM stereo or an AM/FM stereo/cassette receiver.
Both units are Electronically-Tuned Radios (ETR)
and include a clock function. For more information
on radio features, setting procedures, and control
functions refer to the owner's manual.
IN-LINE FUSE
Each radio receives fused battery feed when the ig-
nition switch is in the ON or ACCESSORY position.
There is an additional in-line fuse in the back of the
radio chassis. The in-line fuse (Fig. 1) will blow to
protect the vehicle electrical system in the event of
internal radio failure.
IGNITION-OFF DRAW FUSE
All vehicles are equipped with an Ignition-Off
Draw (IOD) fuse that is removed when the vehicle is
shipped from the factory. This fuse feeds various ac-
cessories that require current when the ignition
switch is in the OFF position, including the clock and
radio station preset memory functions. The fuse is re-
moved to prevent battery discharge during vehicle
storage.The IOD fuse should be checked if the radio station
preset memory or clock functions are erratic or inop-
erative. The IOD fuse is located in the Power Distri-
bution Center (PDC). Refer to underside of PDC
cover for IOD fuse identification.
RADIO ILLUMINATION RELAY
All radios are connected to a radio illumination re-
lay. The relay controls the source of battery feed for
radio/clock display illumination.
When the park and headlamp switch is in the OFF
position, the radio illumination relay remains de-en-
ergized. The radio/clock display receives full battery
voltage through the normally closed contacts of the
relay. This results in the radio/clock display being il-
luminated at full brightness for easier visibility in
daylight.
When the park and headlamp switch is in the ON
position, the radio illumination relay coil is ener-
gized. With the relay coil energized, the normally
closed contacts of the relay open, and the normally
open contacts of the relay close. This causes the ra-
dio/clock display to receive battery feed through the
instrument panel dimmer switch. The display illumi-
nation brightness can now be adjusted with other
panel lamps for night visibility.
SPEAKERS
Speaker system options include two, four or six (XJ
only) speaker locations. On XJ model two-speaker
systems, one speaker is located in each front door.
Four-speaker systems add one speaker at each end of
a rear-mounted overhead sound bar. The premium
six-speaker option upgrades all the speakers in the
above locations, and adds one tweeter at each end of
the lower instrument panel.
On YJ model two-speaker systems, one speaker is
located at each end of the instrument panel. Four-
speaker systems add one speaker at each end of a
rear-mounted overhead sound bar.
Fig. 1 In-Line Fuse
JAUDIO SYSTEMS 8F - 1

RADIO ILLUMINATION RELAY
If the relay fails any one of Relay Tests, it is faulty
and should be replaced. If the relay passes the Relay
Tests, proceed to the Relay Circuit Tests.
On XJ models, the radio illumination relay is lo-
cated in the relay center (Fig. 2), which is fastened to
the lower instrument panel reinforcement behind the
lower instrument panel near the steering column. On
YJ models, the relay is taped to the instrument panel
wiring harness above and to the right of the radio,
near the glove box.
RELAY TESTS
Remove relay to perform the following tests:
(1) A relay in the de-energized position should
have continuity between terminals 87A and 30, and
no continuity between terminals 87 and 30.(2) Resistance value between terminals 85 and 86
(electromagnet) is 7565 ohms.
(3) Connect a battery to terminals 85 and 86. There
should now be continuity between terminals 30 and 87,
and no continuity between terminals 87A and 30.
RELAY CIRCUIT TESTS
With relay still removed, perform the following
tests:
(1) The common feed terminal (30) is connected to
the radio display feed circuit. There should be conti-
nuity between cavity for relay terminal 30 and clock/
radio display feed cavity of radio connector at all
times. If not, repair circuit as required.
(2) The normally closed terminal (87A) is connected
to terminal 30 in the de-energized position. This circuit
provides ignition-switched battery voltage to the radio
display when the headlamp switch is off. There should
be battery voltage present at cavity for relay terminal
87A with the ignition switch in the ON position. If not,
repair circuit to ignition switch as required.
(3) The normally open terminal (87) is connected to
terminal 30 in the energized position. This circuit
provides instrument panel dimmer controlled feed to
the radio display when the headlamp switch is on.
There should be voltage present at cavity for relay
terminal 87 when the headlamp switch is on. Also,
the voltage reading should vary as the panel dimmer
switch is rotated. If not, repair circuit or panel dim-
mer switch as required.
(4) The coil battery terminal (86) connected to the
electromagnet in the relay. Check as follows:
(a) On YJ models, it is energized when the head-
lamp switch is on. There should be battery voltage at
cavity for relay terminal 86 with the headlamp switch
on. If not, repair circuit to headlamp switch as re-
quired.
(b) On XJ models, it is grounded at all times.
There should be continuity to ground at cavity for
relay terminal 86 at all times. If not, repair circuit
to ground as required.
RADIO CONNECTIONS
Fig. 2 Radio Illumination Relay - XJ
RADIO ILLUMINATION RELAY CONNECTIONS
8F - 4 AUDIO SYSTEMSJ

SERVICE PROCEDURES
HORN REMOVE/INSTALL
XJ
(1) Raise and support the vehicle.
(2) Remove the front underbody splash shield.
(3) Remove horn mounting bolt and horn (Fig. 3).
(4) Remove wire from horn.
(5) Reverse removal procedures to install.
YJ
(1) Disconnect wire harness connector from the
horn (Fig. 4).
(2) Remove horn and bracket mounting bolt. Horn
and bracket are removed as an assembly.
(3) Reverse removal procedures to install.
HORN SWITCH REMOVE/INSTALL
WARNING: ON VEHICLES EQUIPPED WITH AN AIR-
BAG, REFER TO GROUP 8M - RESTRAINT SYS-
TEMS BEFORE ATTEMPTING STEERING WHEEL
COMPONENT DIAGNOSIS OR SERVICE. FAILURE
TO TAKE PROPER PRECAUTIONS COULD RESULT
IN ACCIDENTAL AIRBAG DEPLOYMENT AND POS-
SIBLE PERSONAL INJURY.
XJ
(1) Disconnect negative cable from battery and iso-
late.
(2) Using a small screwdriver, remove plastic cover
plug from top outer surface of steering wheel hub
(Fig. 5). Exit vehicle and disarm airbag by reaching
through driver's side window and turning arming
screw counter-clockwise to its travel limit. This is
done using an 8mm socket and manual drive. DO
NOT USE POWER-DRIVEN TOOLS.
(3) From back side of steering wheel, remove 4
nuts attaching airbag module to steering wheel. This
is done using a 10mm socket and manual drive. DO
NOT USE POWER-DRIVEN TOOLS.
(4) Remove airbag module from steering wheel.
(5) To access horn switch retaining screws, pry out
trim cover buttons on back of steering wheel spokes
directly behind horn switches. Remove retaining
screws.
(6) Disconnect horn switch wires located in the
lower portion of steering wheel hub cavity and re-
move switches from steering wheel.
(7) Reverse removal procedures to install. Tighten
hardware as follows:
²airbag module nuts-9to11Nzm (80 to 100 in.
lbs.)
²airbag arming screw - not to exceed 1 to 1.5 Nzm
(10 to 15 in. lbs.).
YJ
(1) Disconnect negative cable from battery.
(2) Remove horn button by pulling straight up.
Fig. 3 Horn Mounting - XJ
Fig. 4 Horn Mounting - YJ
JHORNS 8G - 3

(3) Remove horn button components (Fig. 6).
(4) Reverse removal procedures to install.
(5) Connect negative cable to battery.
HORN CONTACT/CLOCKSPRING
Refer to Group 19 - Steering for information on ser-
vice of the horn switch contact (YJ) or clockspring
(XJ).
Fig. 5 Airbag Module Remove/Install
Fig. 6 Horn Switch Remove/Install - YJ
8G - 4 HORNSJ

SERVICE PROCEDURES - YJ
WINDSHIELD WIPER BLADE REMOVE/INSTALL
(1) Rotate the wiper blade release (Fig. 3) clock-
wise. This will release the wiper blade from the pivot
pin.
CAUTION: Take care to ensure that the wiper arm
does not strike the windshield after the wiper blade
has been removed.
(2) To install, place the blade assembly on the
wiper arm and snap the blade assembly into position.
WINDSHIELD WIPER ARM REMOVE/INSTALL
(1) Pull the wiper arm forward.
(2) Insert an ice pick type tool into the hole (Fig.
4).
(3) Grasp the wiper arm above the pivot nut.
(4) Pull and remove the wiper arm assembly.
(5) To install, push the wiper arm over the pivot
shaft. Be sure the pivot shaft is in the park position
and the wiper arm is positioned correctly on the
windshield (Fig. 5).
LIFTGATE WIPER ARM REMOVE/INSTALL
(1) Install wiper arm remover, Snap On A192 or
equivalent, on wiper arm (Fig. 6). Lift arm and then
remove from pivot shaft.
CAUTION: Do not use a screwdriver or other pry-
ing tool to remove an arm. This may distort it in a
way that will allow it to come off the pivot shaft in
the future despite how carefully it is installed.
NEVER push or bend the spring clip in the base of
the arm in an attempt to release the arm. This clip
is self releasing.(2) Reverse removal procedures to install.
(3) Wet the liftgate glass and check the park posi-
tion by operating the wiper motor several times.
WINDSHIELD WIPER LINKAGE AND PIVOTS
REMOVE/INSTALL
(1) Remove the left and right wiper arms.
Fig. 3 Wiper Blade Remove/Install
Fig. 4 Windshield Wiper Arm Remove/Install
Fig. 5 Windshield Wiper Arm Indexing
JWIPER AND WASHER SYSTEMS - YJ 8K - 17

UNDERHOOD LAMP BULB REPLACEMENTÐXJ
REMOVAL
(1) Disconnect the wire harness connector from the
underhood lamp (Fig. 23).
(2) Rotate the bulb counter-clockwise and remove
it from the lamp base socket.
INSTALLATION
(1) Insert a replacement bulb in the lamp base
socket and rotate it clockwise.
(2) Connect the wire harness connector to the
lamp.
UNDERHOOD LAMP REPLACEMENTÐXJ
REMOVAL
(1) Disconnect the wire harness connector from the
lamp.
(2) Rotate the bulb counter-clockwise and remove
it from the lamp base socket.
(3) Remove the screw that attaches the lamp re-
flector and support bracket to the hood inner panel.
(4) Remove the lamp from the hood inner panel.
Fig. 19 Center High Mounted Stop Lamp (CHMSL)
Assembly
Fig. 20 Removing CHMSL Access Door
Fig. 21 Replacing CHMSL Bulb
Fig. 22 Underhood Lamp
JLAMPSÐXJ VEHICLES 8L - 13

INSTALLATION
(1) Position the underhood lamp on the hood inner
panel.
(2) Install the attaching screw through the lamp
and into the hood panel. Tighten the screw securely.
(3) Insert a replacement bulb in the lamp base
socket and rotate it clockwise.
(4) Connect the wire harness connector to the
lamp.
SENTINEL HEADLAMP DELAY MODULEÐXJ
SERVICE INFORMATION
The Headlamp Module delays the de-activation of
the headlamps for 45615 seconds after the ignition
switch is turned OFF. The driver engages the module
by turning the ignition switch OFF, then turning the
headlamps OFF.
The headlamp delay module is located behind the
I/P next to the headlamp switch.
HEADLAMP DELAY MODULE REPLACEMENTÐXJ
The headlamp delay module is attached to the in-
side of the instrument panel to the right of the head-
lamp switch.
REMOVAL
(1) Remove the lower instrument panel.(2) Remove the screw that attaches the module to
the inside of the instrument panel.
(3) Disconnect the wire harness connector and re-
move the module from the instrument panel.
INSTALLATION
(1) Position the module inside the I/P and connect
the wire harness connector to the module.
(2) Install the screw that attaches the module to
the inside of the instrument panel.
(3) Remove the lower instrument panel.
HEADLAMP DELAY FUNCTION TROUBLE
DIAGNOSISÐXJ
DELAY FUNCTION INOPERATIVE
(1) Remove, inspect and test the HD LP DLY fuse.
Replace if defective.
(2) Remove the delay module from the I/P. Do not
disconnect the wire harness connector. Turn the igni-
tion switch to the RUN position. Place the headlamp
switch in headlamps ON position. Turn the ignition
to the OFF position for a resistance test.
(3) Measure the resistance from the delay module
terminal 4 to vehicle body ground. The ohmmeter
should indicate zero ohms. If not, repair the open cir-
cuit in the wire harness to vehicle body ground.
(4) Measure the voltage between the delay module
terminal 8 and vehicle body ground. The voltmeter
should indicate battery voltage. If not, repair the
open circuit in the wire harness to the instrument
cluster indicator connector terminal 14.
(5) Measure the voltage between the delay module
terminal 6 and vehicle body ground. The voltmeter
should indicate battery voltage. If not, repair the
open circuit in the wire harness to the headlamp
switch.
(6) Measure the voltage between the delay module
terminal 2 and vehicle body ground. The voltmeter
should indicate battery voltage. If not, repair the
open circuit in the wire harness to the fuse.Fig. 23 Underhood Lamp Components
8L - 14 LAMPSÐXJ VEHICLESJ