1994 JEEP CHEROKEE low beam

PORTABLE STARTING UNIT
There are many types of portable starting units
available for starting engines. Follow the manufac-
turer's instructions when involved in any engine
starting procedure.
HOISTING RECOMMENDATIONS
FLOOR JACK
When properly positioned, a floor jack can be used
to lift a Jeeptvehicle. Support the vehicle in the
raised position with jack stands at the front and rear
ends as applicable (Fig. 7).
CAUTION: Do not attempt to lift a JeepTvehicle
with a floor jack positioned under:
²an axle tube,
²a body side sill,
²a steering linkage component,
²a drive shaft,
²the engine or transmission oil pan,
²the fuel tank, or
²a front suspension arm.
Use the correct sub-frame rail or frame rail
lifting locations only (Fig. 7).
HOIST
A Jeeptvehicle can be lifted with a swiveling-arm
type hoist; with a wheel-lift, twin-post hoist; or with
a ramp-type, drive-on hoist.
When a swiveling-arm, frame-contact type
hoist is used, ensure that the lifting pads are po-
sitioned at the correct sub frame rail (Fig. 7).
TOWING RECOMMENDATIONS
TOWING EQUIPMENT
A vehicle equipped with SAE approved sling-type
towing equipment can be used to tow all Jeeptvehi-
cles (Fig. 8). When it is necessary to rear-tow a vehi-
cle, use the wheel-lift towing method with a tow
dolly located under the front wheels. A vehicle with
flat-bed towing equipment can also be used to trans-
port a disabled vehicle.
A wooden crossbeam with spacer blocks could pos-
sibly be required for proper connection when using
the sling-type, front-end towing method (Fig. 9).
SAFETY PRECAUTIONS
The following safety precautions must be consid-
ered when preparing for and during a vehicle towing
operation:
Fig. 7 Correct Vehicle Lifting LocationsÐTypical
Fig. 8 Tow Vehicles With Approved Equipment
Fig. 9 Crossbeam & Spacer Block Construction
0 - 8 LUBRICATION AND MAINTENANCEJ

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

(3) Move vehicle with the headlamps located di-
rectly above the 7.62-meters (25-feet) reference line.
(4) Equalize all the tire pressures.
(5) Rock vehicle from side to side to stabilize the
springs and shock absorbers.
(6) Use tape to attach a vehicle centerline on the
screen/wall (6). Ensure that it is aligned with and
represents the centerline of the vehicle.
(7) Measure distance between the vehicle head-
lamp centers. Divide this distance by two. Measure
the one/half distance outward from each side of the
vehicle centerline (6). Use tape to attach the right
and left lamp vertical centerline (4 and 5) on the
screen/wall (6).
(8) Measure the distance from the center of each
headlamp to the floor.
(9) Measure the lamp-to-floor distance upward
from the floor at each lamp vertical centerline (4 and
5). Use tape to attach the lamp horizontal centerline
(3) on the screen/wall.
ADJUSTMENT
(1) Remove screws and both headlamp bezels.
(2) Clean front of the headlamps.
(3) Place headlamps on LOW beam.
(4) Cover front of the headlamp that is not being
adjusted.
(5) Turn vertical adjustment screw until the head-
lamp beam pattern on screen/wall is similar to the
pattern depicted in Figure 6.
When using a headlamp aiming screen:
²adjust the headlamps so that the beam horizontal
position is at 0; and
²adjust the beam vertical position is 25 mm (1 in)
downward from the lamp horizontal centerline.(6) Rotate the horizontal adjustment screw until
the headlamp beam pattern on the aiming screen/
wall similar to the pattern in Figure 6.
(7) Cover front of the headlamp that has been ad-
justed and adjust the other headlamp beam as in-
structed above.
(8) Install headlamp bezels. Tighten the screws se-
curely.
HEADLAMP SWITCH REPLACEMENT
REMOVALÐXJ VEHICLES
(1) Disconnect battery negative cable.
(2) Place headlamp switch control knob in the
headlamp ON position.
(3) Depress the switch shaft release/retainer but-
ton via the underside of the instrument panel. Pull
the switch control shaft knob outward.
(4) Remove the headlamp switch spanner nut from
the front of the instrument panel (Fig. 8).
(5) Disconnect the wire harness connector from the
switch.
(6) Remove the headlamp switch from the instru-
ment panel.
INSTALLATIONÐXJ VEHICLES
(1) Install the headlamp switch in the instrument
panel and connect the wire harness connector.
(2) Install the headlamp switch spanner nut.
(3) Insert the headlamp switch control shaft in the
spanner nut and force it into the switch.
(4) Connect the battery negative cable.
REMOVALÐYJ VEHICLES
(1) Disconnect the battery negative cable.
Fig. 5 Headlamp Beam Adjustment ScrewsÐXJ/YJ
Vehicles
Fig. 6 Headlamp Beam PatternÐTypical
8L - 4 LAMPSJ

FOG LAMP SERVICE INFORMATION
Fog lamps can be operatedONLYwhen the head-
lamps are on LOW beam. If the headlamps are
switched to HIGH beam, the fog lamps will not oper-
ate.
Also, the fog lamps ON display on the switch will:
²be illuminated when the headlamps are switched
to LOW beam; and
²be extinguished when the headlamps are switched
to HIGH beam.
FOG LAMP TROUBLE DIAGNOSIS
ONE FOG LAMP INOPERATIVE
(1) Place the headlamp switch in the full ON posi-
tion, the dimmer switch in the LOW beam position
and the fog lamp switch in the ON position.
(2) Disconnect the applicable fog lamp wire har-
ness connector (Fig. 33).
(3) Measure the resistance between the lamp con-
nector terminals. The ohmmeter should indicate zero
ohms. If not OK, replace the bulb.
(4) Measure the resistance between the wire har-
ness connector ground terminal and vehicle body
ground. The ohmmeter should indicate zero ohms. If
not OK, repair the open circuit in the wire harness
to vehicle body ground.
(5) Measure the voltage between the wire harness
connector voltage supply terminal and body ground.
The voltmeter should indicate battery voltage. If not
OK, repair the open circuit in the wire harness that
leads to the source of battery voltage.
BOTH FOG LAMPS INOPERATIVE
(1) Place headlamp switch in the full ON position.The dimmer switch in the LOW beam position. The
fog lamp switch in the ON position.
(2) Measure the voltage between the fog lamp
switch wire harness connector terminal B and vehi-
cle body ground. The voltmeter should indicate bat-
tery voltage. If not OK, repair the open circuit in the
wire harness that leads to the headlamp dimmer
switch circuit.
(3) Measure the voltage between the fog lamp
switch connector terminal C and vehicle body
ground. The voltmeter should indicate battery volt-
age. If not OK, replace the fog lamp switch.
(4) Measure the voltage between the fog lamp re-
lay connector terminal 1 and vehicle body ground.
The voltmeter should indicate battery voltage. If not
OK, repair the open circuit in the wire harness that
leads to the power distribution center/PDC.
(5) Measure the voltage between the fog lamp re-
lay connector terminal 5 and vehicle body ground.
The voltmeter should indicate battery voltage. If not
OK, repair the open circuit in the wire harness that
leads to the fog lamp switch.
(6) Measure the voltage between the fog lamp re-
lay connector terminal 2 and vehicle body ground.
The voltmeter should indicate battery voltage. If not
OK, repair the open circuit in the wire harness that
leads to vehicle body ground.
(7) Measure the voltage between the fog lamp re-
lay connector terminal 4 and vehicle body ground.
The voltmeter should indicate battery voltage. If not
OK, replace the relay.
FOG LAMP BEAM ADJUSTMENT
Use an ``aiming'' screen for fog lamp beam aim ad-
justment.
PREPARATION
Prior to adjustment, the following preparation is
required.
Fig. 32 Replacing CHMSL Bulb
Fig. 33 Fog Lamp & Wire Harness ConnectorÐXJ
Vehicles
8L - 12 LAMPSJ

(1) Position the vehicle in dark area with a level
floor and with a screen (wall) that has a white sur-
face.
(2) Mark a reference line on the floor 7.62 meters
(25 feet) away from and parallel to the ``aiming''
screen/wall.
(3) Position vehicle with the fog lamps located di-
rectly above the 7.62-meters (25-feet) reference line.
(4) Equalize all the tire pressures.
(5) Rock the vehicle from side to side to stabilize
the springs and shock absorbers.
(6) Refer to Figure 34. Use tape to attach a vehicle
centerline on the screen/wall. Ensure that it is
aligned with and represents the centerline of the ve-
hicle.
(7) Measure the distance between the vehicle fog
lamp centers. Divide this distance by two. Measure
the one/half distance outward from each side of the
vehicle centerline. Use tape to attach the right and
left fog lamp vertical centerline on the screen/wall.
(8) Measure the distance from the center of each
fog lamp to the floor.
(9) Measure the lamp-to-floor distance upward
from the floor at each lamp vertical centerline. Use
tape to attach the lamp horizontal centerline on the
screen/wall.
BEAM ADJUSTMENT
(1) Loosen the fog lamp attaching hardware at the
support bracket.
(2) Place the headlamp and fog lamp switches in
the ON position.
(3) Ensure that the headlamp dimmer switch is in
the LOW beam position.
(4) Adjust the fog lamp beams according to the fol-
lowing guidelines:
²a properly adjusted fog lamp (up/down adjustment)
will project a beam pattern on the screen similar to
the pattern depicted in Figure 28; and
²each fog lamp should be centered (left/right adjust-
ment) on the screen left/right vertical center line.
(5) Tighten the fog lamp support bracket hard-
ware.
FOG LAMP BULB/ELEMENT REPLACEMENT
REMOVAL
(1) For YJ vehicles, remove the screws that attach
the stone shield and the reflector to the lamp hous-
ing. Remove the stone shield and reflector from the
lamp housing (Fig. 35).
(2) For XJ vehicles, remove the screws that attach
the bezel and lens to the lamp housing. Remove the
bezel and the lens from the lamp housing (Fig. 36).
(3) Remove the bulb/element holder from the lens/
reflector.
(4) Remove the bulb/element from the holder.
REMOVAL
CAUTION: Always handle replacement quartz bulbs/
elements with a clean cloth. DO NOT handle quartz
bulbs/elements with bare hands.
(1) Use a clean cloth to install a replacement bulb
holder.
(2) Install the bulb holder in the lens/reflector.
Fig. 34 Fog Lamp Beam Pattern
Fig. 35 Fog LampÐYJ Vehicles
Fig. 36 Fog LampÐXJ Vehicles
JLAMPS 8L - 13

Wiring Diagram Name Sheet Number
Fuse #15...............................1,41
Fuse #17...........................2,10,55,74
Fuse #18...............................1,66
Fuse #19.............................1,41,47
Gauges
Engine Coolant Temperature Gauge...........59,60,61
Engine Oil Pressure Gauge.................59,60,61
Fuel Gauge...........................59,60,61
G Sensor..................................30
Generator.................................5,6
Glove Box Lamp.............................49
Hazard Flasher............................35,46
Headlamp Delay Module........................43
Headlamp Dimmer Switch.......................41
Headlamp Switch...........................41,42
Fog Lamp Illumination........................42
Fog Lamp Switch...........................42
Headlamp Dimmer Switch.....................41
Headlamp Switch...........................41
Headlamps...............................39,40
Heat Mode Select Switch.......................68
Heated Oxygen Sensor.......................13,21
Heated Rear Window..........................66
Relay...................................66
Grid...................................66
Switch..................................66
Heated Rear Window Switch Lamp.................47
Heater A/C Panel Lamp........................47
Heater and A/C System......................69,70
A/C Mode Selector Switch.....................70
A/C Compressor Clutch.......................69
A/C Compressor Clutch Relay...................69
A/C Heater Blower Motor......................70
A/C Thermostat............................69
A/C Low Pressure Switch.....................69
Blower Resistor............................70
Blower Switch.............................70
Powertrain Control Module.....................69
Heat Mode Select Switch.......................68
Heater Blower Motor..........................68
Heater,Engine Block...........................37
Heater System..............................68
Blower Resistor............................68
Blower Switch.............................68
Heater Blower Motor.........................68
Heater Mode Select Switch....................68
Heavy Duty Cooling 4.OL.......................23
Fan Control Relay...........................23
Powertrain Control Module.....................23
Radiator Fan Motor.........................23
High Beam Indicator Lamp..................59,60,61
High Beam Relay............................40
Hi-Line Instrument Cluster.......................61
Horn Brush/Slip Ring..........................34
Horn Relay................................34
Horn Switch................................34
Horns....................................34
Hydraulic Actuation Unit, ABS....................33Wiring Diagram Name Sheet Number
Idle Air Control Motor.......................15,22
Ignition Key Warning Switch.....................74
Ignition Switch..............................2,9
Ignition System............................9,10
Injectors................................15,22
In Line Circuit Breaker..........................2
Instrument Cluster............................55
Powertrain Control Module.....................55
Washer Fluid Level Switch.....................55
Instrument Cluster (Hi-Line)......................61
Instrument Cluster (Lo-Line).....................60
Instrument Cluster (Standard)....................59
Instrument Cluster Connector..................55,108
Instrument Cluster Printed Circuit Board (W/ABS).......57
Instrument Cluster Printed Circuit Board (W/O ABS)......58
Instrument Cluster Indicators.....................56
Instrument Panel Ground.......................62
Instrument Panel Illumination...................47,48
Ashtray Lamp.............................48
Cigar Lighter Lamp..........................48
Fog Lamp Illumination........................47
Heater A/C Panel Lamp.......................47
Heater Rear Window Switch Lamp................47
Rear Wiper Wash Switch Lamp..................47
Transfer Case Lamp.........................48
Transmission Range Switch Lamp................48
Intake Air Temperature Sensor..................14,19
Intermittent Front Wipers/Washers.................64
Intermittent Wiper Module.......................64
Lamps
ABS Green Indicator Lamp.....................57
ABS Red Indicator Lamp......................57
Ashtray Lamp.............................48
Cargo Lamp..............................50
Center High Mounted Stop Lamps................98
Cigar Lighter Lamp..........................48
Dome Lamp..............................51
Dome/Reading Lamp.........................51
Fog Lamp Illumination........................47
4WD Indicator Lamp.....................26,57,58
Full Time Indicator Lamp....................57,58
Glove Box Lamp...........................49
Heated Rear Window Switch Lamp...............47
Heater A/C Panel Lamp.......................47
High Beam Indicator Lamp.................59,60,61
Indicator Lamp 4WD.......................57,58
Instrument Cluster Illumination Lamps.........59,60,61
Left Back-Up Lamp........................91,93
Left Courtesy Lamp.........................49
Left Fog Lamp.............................39
Left Headlamp.............................39
Left Park/Turn Signal Lamp....................39
Left Side Marker Lamp (Front)..................39
Left Side Marker Lamp (Rear)................91,93
Left Tail/Stop Lamp.......................91,93
Left Turn Indicator Lamp..................59,60,61
Left Turn Lamp (Amber)....................91,93
Left Vanity Lamp...........................51
JWIRING DIAGRAMS 8W - 151