Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Jeep Cherokee XJ 1988-1989.1993-1995 Approved 1994 XJ Jeep Cherokee 94XJ_8L
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J LAMPS 8L - 1
LAMPS
CONTENTS
page page
EXTERIOR LAMPS ....................... 1 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . 23
INTERIOR LAMPS . . . . . . . . . . . . . . . . . . . . . . 19
EXTERIOR LAMPS
INDEX
page page
Back-up/Rear Turn Signal/Tail Lamp Bulb Headlamp Delay Module Replacement--XJ
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Vehicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Center High Mounted Stop Lamp (CHMSL)--XJ . 10 Headlamp Dimmer Switch Replacement . . . . . . . . 6
Center High Mounted Stop Lamp (CHMSL)--YJ . 11 Headlamp Switch Replacement . . . . . . . . . . . . . . . 4
Daytime Running Lights (Canada Only) . . . . . . . . 16 Headlamp Trouble Diagnosis--XJ Vehicles . . . . . . 1
DRL Module Replacement . . . . . . . . . . . . . . . . . . 16 Headlamp Trouble Diagnosis--YJ Vehicles . . . . . . 2
Fog Lamp Beam Adjustment . . . . . . . . . . . . . . . . 12
Fog Lamp Bulb/Element Replacement . . . . . . . . . 13 License Plate Lamp . . . . . . . . . . . . . . . . . . . . . . . 10
Fog Lamp Replacement . . . . . . . . . . . . . . . . . . . 15 Sentinel Headlamp Delay Module--XJ Vehicles . . 15
Fog Lamp Service Information . . . . . . . . . . . . . . . 12 Service Information . . . . . . . . . . . . . . . . . . . . . . . . 1
Fog Lamp Switch Replacement . . . . . . . . . . . . . . 14 Side Marker Lamp Bulb Replacement . . . . . . . . . . 7
Fog Lamp Trouble Diagnosis . . . . . . . . . . . . . . . . 12 Switch Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Front Park/Turn Signal Lamp Bulb Replacement . . 8 Underhood Lamp Bulb Replacement . . . . . . . . . . 18
Headlamp Beam Adjustment . . . . . . . . . . . . . . . . . 3 Underhood Lamp Replacement . . . . . . . . . . . . . . 18
Headlamp Bulb Replacement ................ 3 Underhood Lamp Service Information . . . . . . . . . 17
Headlamp Delay Function Trouble Diagnosis--XJ
Vehicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
SERVICE INFORMATION (4) Disconnect the front lamp wire connector. Mea-
Exterior lamp circuits are comprised of the head- sure resistance between connector terminals 5 and 2.
lamp circuit, fog lamp circuit, and tail/side marker/ Next measure between terminal 5 and 7. The ohm-
park lamp circuit. Battery voltage is controlled by meter should indicate zero ohms for both measure-
both the headlamp ON/OFF switch and headlamp ments. If not OK, replace the headlamp bulbs.
dimmer switch. (5) Measure the voltage between the dimmer
The dimmer switch functions as a fog lamp switch. switch wire connector terminal 2 and body ground.
Voltage is applied to the fog lamp switch only when The voltmeter should indicate battery voltage. If not
the dimmer switch is in the low beam position. OK, continue with the next step.
The dimmer switch is integral with the turn
HEADLAMP TROUBLE DIAGNOSIS--XJ VEHICLES signal and is located on the steering column.
The dimmer switch switches the headlamp beam
LOW AND HIGH BEAM INOPERATIVE BOTH when the turn signal lever is pulled rearward.
HEADLAMPS (6) Disconnect the dimmer switch wire connector
(1) Place the headlamp switch in the ON position.
and place the headlamp switch in the OFF position.
(2) Test the 40 amp fuse for continuity. If bad, re- Measure the resistance from terminal 2 to vehicle
place fuse. body ground. The ohmmeter should indicate infinite
(3) Insert the test probe into terminal 5 of the
resistance. If OK, replace the headlamp switch and
front lamp wire harness connector. Measure the re-
continue with the next step. If not OK, repair the
sistance from terminal 5 to body ground. The ohm- short circuit in the wire harness that leads to termi-
meter should indicate zero ohms. If not OK, repair
nal 2.
the open circuit in the harness to body ground.
8L - 2 LAMPS J
(7) Measure the resistance from the dimmer switch (2) Place the headlamp switch in the ON position.
wire harness connector terminal 1 to vehicle body (3) Measure the voltage between the headlamp
ground. The ohmmeter should indicate zero ohms. If switch connector voltage supply terminal and vehicle
OK, continue with the next step. If not OK, repair body ground. The voltmeter should indicate battery
the short circuit in the wire harness that leads to voltage. If not OK, repair the open circuit in the wire
terminal 1. harness between the fuse and the switch connector
(8) Measure the resistance from the dimmer switch terminal.
wire harness connector terminal 3 to vehicle body (4) Measure the voltage between the headlamp
ground. The ohmmeter should indicate zero ohms. If switch connector battery voltage OUT terminal and
OK, test the dimmer switch. Replace, if defective. vehicle body ground. The voltmeter should indicate
Connect the wire harness connector to the dimmer battery voltage. If not OK, replace the headlamp
switch. If not defective, repair the short circuit in the switch.
wire harness that leads to terminal 3.
DIMMER SWITCH--ALL VEHICLES
LOW OR HIGH BEAM INOPERATIVE BOTH (1) Place the headlamp switch in the ON position.
HEADLAMPS Place the dimmer switch in the HIGH or LOW beam
(1) Place the headlamp switch in the OFF position. position, as applicable.
Disconnect the dimmer switch wire harness connec- (2) Measure the voltage between the dimmer
tor. switch connector voltage supply terminal and vehicle
(2) Measure the resistance from the dimmer switch body ground. The voltmeter should indicate battery
connector terminal 1 to body ground. The ohmmeter voltage. If not OK, repair the open circuit in the wire
should indicate zero ohms. If not OK, repair the open harness between the headlamp switch and the dim-
circuit in the wire harness that leads to the head- mer switch.
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 DIAGNOSIS--YJ 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. Fig. 1 Headlamp Dimmer Switch Terminals
(6) Measure the resistance from each headlamp (3) Place the dimmer switch in the LOW beam po-
bulb connector terminal A to body ground. The ohm- sition. Measure the voltage between the dimmer
meter should indicate zero ohms. If not OK, repair
switch connector low beam voltage OUT terminal
the open circuit in the wire harness between the con-
and body ground. The voltmeter should indicate bat-
nectors and vehicle body ground.
tery voltage. If not OK, replace the dimmer switch.
SWITCH TESTS (4) Place the dimmer switch in the HIGH beam po-
sition. Measure the voltage between the dimmer
HEADLAMP--ALL VEHICLES switch connector high beam voltage OUT terminal
(1) Refer to the applicable wiring diagram for ter- and body ground. Voltmeter should indicate battery
minal reference. voltage. If not OK, replace dimmer switch.
J LAMPS 8L - 3
HEADLAMP BULB REPLACEMENT INSTALLATION
(1) Position the bulb in the bucket and connect the
REMOVAL wire harness connector.
(1) Remove the screws and the headlamp bezel (2) Position retaining ring on the headlamp bulb
(Figs. 2 and 3). 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 Jeep vehicles. 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).
Fig. 2 Headlamp Components--XJ Vehicles
Fig. 4 Headlamp ``Aiming'' Screen
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
Fig. 3 Headlamp Components--YJ Vehicles aim adjustment, use following procedure.
(1) Position the vehicle in dark area with a level
(2) Remove the screws and headlamp bulb retain-
floor and with a screen (wall) that has a white sur-
ing ring.
face.
(3) Disconnect the headlamp bulb wire harness (2) Refer to Figure 4. Mark a reference line (2) on
connector and remove the bulb from the bucket. the floor 7.62 meters (25 feet) away from and parallel
to the screen/wall (1).
8L - 4 LAMPS J
(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 Fig. 6 Headlamp Beam Pattern--Typical
(1) Remove screws and both headlamp bezels.
(6) Rotate the horizontal adjustment screw until
(2) Clean front of the headlamps.
the headlamp beam pattern on the aiming screen/
(3) Place headlamps on LOW beam.
wall similar to the pattern in Figure 6.
(4) Cover front of the headlamp that is not being
(7) Cover front of the headlamp that has been ad-
adjusted.
justed and adjust the other headlamp beam as in-
(5) Turn vertical adjustment screw until the head-
structed above.
lamp beam pattern on screen/wall is similar to the
(8) Install headlamp bezels. Tighten the screws se-
pattern depicted in Figure 6. curely.
HEADLAMP SWITCH REPLACEMENT
REMOVAL--XJ 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.
INSTALLATION--XJ VEHICLES
Fig. 5 Headlamp Beam Adjustment Screws--XJ/YJ (1) Install the headlamp switch in the instrument
Vehicles panel and connect the wire harness connector.
When using a headlamp aiming screen: (2) Install the headlamp switch spanner nut.
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