bulb JEEP CHEROKEE 1994 Service Owner's Manual

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

INSTALLATION
(1) Force the dimmer switch onto the actuator rod
and install screws.DO NOT tighten the retaining
screws at this time.
(2) Remove the tape attaching the actuator rod to
the steering column.
(3) Adjust the dimmer switch as follows:
²compress the switch and insert a 3/32-inch diame-
ter drill bit into the adjustment hole (Fig. 16);
²the drill bit will prevent any horizontal movement
of the switch;
²move the switch toward the steering wheel to re-
move any existing actuator rod lash;
²tighten screws with 4 Nzm (35 in. lbs.) torque.
²connect battery negative cable;
²remove drill bit and test the switch operation; and
²re-adjust the switch, if necessary.
(4)XJ vehiclesÐ install the lower instrument
panel (Fig. 12)(5)YJ vehicles:
²position the I/P shroud under the steering column;
²slide the indicator panel holding tabs (Fig. 14) into
the shroud notches;
²place the assembled I/P shroud over the indicator
lamp gasket;
²install and tighten screws;
²install and tighten remaining shroud screws;
²raise and support the A/C evaporator housing (Fig.
15); and
²install the evaporator housing-to-instrument panel
screws and evaporator support bracket screw.
SIDE MARKER LAMP BULB REPLACEMENT
REMOVALÐXJ VEHICLES
(1) Remove the screws from the side marker lamp
lens and housing. Separate lens and housing from
the headlamp bezel (Fig. 17).
(2) Remove the bulb and socket from the back side
of the lamp housing.
(3) Remove bulb from socket.
INSTALLATIONÐXJ VEHICLES
(1) Install a replacement bulb in the socket.
(2) Install bulb and socket in the back of side
marker lamp housing.
(3) Position the side marker lens and housing on
the headlamp bezel (Fig. 17).
(4) Install the side marker lamp screws. Tighten
the screws.
REMOVALÐYJ VEHICLES
(1) Remove side marker bulb socket via the under-
side of the fender. Rotate it one-third turn and sepa-
rate it from the side marker lamp housing (Fig. 18).
(2) Remove the bulb from the socket by pulling it
straight outward.
Fig. 15 A/C Evaporator HousingÐYJ Vehicles
Fig. 16 Headlamp Dimmer Switch Adjustment
Fig. 17 Side Marker LampÐXJ Vehicles
JLAMPS 8L - 7

INSTALLATIONÐYJ VEHICLES
(1) Install a replacement bulb in the socket.
(2) Install the bulb and socket in the side marker
lamp housing (Fig. 18).
FRONT PARK/TURN SIGNAL LAMP BULB
REPLACEMENT
REMOVALÐXJ VEHICLES
(1) Remove the headlamp bezel screw and the side
marker lamp lens/housing screw (Fig. 19).
(2) Separate the side marker lamp from the head-
lamp bezel and remove the screws from the head-
lamp bezel (Fig. 20).(3) Remove screws from the park/turn signal lamp
housing (Fig. 21).
(4) Separate the lamp housing from the headlamp
bezel.
(5) Rotate the bulb socket one-third turn and re-
move it from the lamp housing.
(6) Remove bulb from socket.
INSTALLATIONÐXJ VEHICLES
(1) Install a replacement bulb in the socket.
(2) Install bulb and socket in the lamp housing.
(3) Position the park/turn signal lamp housing on
the headlamp bezel.
(4) Install lamp housing screws. Tighten the
screws.
Fig. 18 Side Marker Lamp BulbÐYJ Vehicles
Fig. 19 Headlamp Bezel & Side Marker LampÐXJ
Vehicles
Fig. 20 Headlamp Bezel Removal/Installation
Fig. 21 Park/Turn Signal Lamp Housing Removal
8L - 8 LAMPSJ

(5) Install the outer screws in the headlamp bezel.
Tighten the screws.
(6) Position the side marker lamp lens/housing on
the headlamp bezel.
(7) Install side marker lamp lens/housing screws
and headlamp bezel (Fig. 19). Tighten the screws.
REMOVALÐYJ VEHICLES
(1) Remove the park/turn signal lamp housing
screws (Fig. 22).
(2) Separate the park/turn signal lamp housing
from the grille panel.
(4) Turn the bulb socket and remove it from the
lamp housing.
(3) Pull the bulb straight out of the socket.
INSTALLATIONÐYJ VEHICLES
(1) Install a replacement bulb in the socket.
(2) Install the bulb and socket in the lamp hous-
ing.
(3) Position the park/turn signal lamp housing at
the opening in the grille panel.
(4) Install the lamp housing retaining screws.
Tighten the screws securely.
BACK-UP/REAR TURN SIGNAL/TAIL LAMP BULB
REPLACEMENT
REMOVALÐXJ VEHICLES
(1) Remove the tail lamp housing upper retaining
screws. Slide the lamp housing upward off the lower
screw and separate it from the rear of the vehicle.(2) Rotate the bulb socket one-third turn and re-
move the bulb socket from the lamp housing.
(3) Remove the bulb from the socket.
INSTALLATIONÐXJ VEHICLES
(1) Install a replacement bulb in the socket.
(2) Install the bulb and socket in the lamp housing.
(3) Position the lamp housing in the opening at the
rear of the vehicle.
(4) Install the lamp housing screws. Tighten the
screws securely.
REMOVALÐYJ VEHICLES
(1) Remove the lens retaining screws from the tail
lamp housing (Fig. 25).
(2) Separate the lens from the tail lamp housing.
(3) Remove the bulb from the lamp socket.
INSTALLATIONÐYJ VEHICLES
(1) Install a replacement bulb in the lamp socket.
(2) Position the lens on the lamp housing.
(3) Install the lens retaining screws. Tighten the
screws securely.
Fig. 22 Park/Turn Signal Lamp Bulb
ReplacementÐYJ Vehicles
Fig. 23 Tail Lamp HousingÐXJ Vehicles
Fig. 24 Bulb Socket RemovalÐXJ Vehicles
JLAMPS 8L - 9

LICENSE PLATE LAMP
REMOVALÐXJ VEHICLES
(1) Remove screws and the license plate lamp visor
from the liftgate (Fig. 26).
(2) Remove the bulb from the lamp socket.
INSTALLATIONÐXJ VEHICLES
(1) Install a replacement bulb in the lamp socket.
(2) Position the license plate lamp visor on the lift-
gate and install screws. Tighten the screws securely.
CENTER HIGH MOUNTED STOP LAMP
(CHMSL)ÐXJ
The CHMSL is mounted at the top of the rear win-
dow and has two bulbs (Fig. 27).(1) Raise liftgate.
(2) Remove CHMSL access door (Fig. 28)
(3) Remove CHMSL lamp mounting screws.
(4) Remove CHMSL lamp assembly.
(5) Replace bulbs if necessary (Fig. 29).
To install, reverse removal procedure.
Fig. 25 Back-up/Rear Turn Signal/Tail Lamp Bulb
ReplacementÐYJ Vehicles
Fig. 26 License Plate Lamp Visor
Fig. 27 Center High Mounted Stop Lamp (CHMSL)
Assembly
Fig. 28 Removing CHMSL Access Door
8L - 10 LAMPSJ

CENTER HIGH MOUNTED STOP LAMP (CHMSL)ÐYJ
The CHMSL is mounted on top of a bracket that
attaches to the spare tire carrier (Fig. 30).
(1) Remove the CHMSL lens (Fig. 31).(2) Remove CHMSL lamp housing (Fig. 32)
(5) Replace bulbs if necessary.
To install, reverse removal procedure.
Fig. 30 Center High Mounted Stop Lamp (CHMSL) Bracket Assembly
Fig. 29 Replacing CHMSL Bulb
Fig. 31 Removing CHMSL Access Door
JLAMPS 8L - 11

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

UNDERHOOD LAMP BULB REPLACEMENT
REMOVALÐALL VEHICLES
(1) Disconnect the wire harness connector from the
underhood lamp.
(2) Rotate the bulb counter-clockwise and remove
it from the lamp base socket.
INSTALLATIONÐALL VEHICLES
(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 REPLACEMENT
REMOVALÐALL VEHICLES
(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.
INSTALLATIONÐALL VEHICLES
(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.
8L - 18 LAMPSJ

INTERIOR LAMPS
INDEX
page page
Dome Lamp Replacement.................. 20
Dome/Courtesy Lamp Service Information...... 19
Dome/Courtesy Lamp Trouble Diagnosis....... 19
Hardtop Dome/Cargo Lamp Bulb ReplacementÐYJ
Vehicles.............................. 20Illuminated Entry System Service Information . . . 20
Illuminated Entry System Trouble Diagnosis.... 21
Lighted Vanity Mirror...................... 19
Lighted Vanity Mirror Trouble Diagnosis....... 19
Overhead ConsoleÐXJ Vehicles............. 20
DOME/COURTESY LAMP SERVICE INFORMATION
XJ VEHICLES
Voltage is applied at all times via the dome lamp
fuse to each of the interior lamp bulbs. The interior
lamp bulbs illuminate when they are connected to
body ground via the switch:
²headlamp switch,
²glove box switch,
²door pillar switch, and
²liftgate switch (if the cargo lamp is ON.)
If equipped with Security Alarm Module, refer to
Group 8QÐVehicle Theft Security System.
YJ VEHICLES
The dome/cargo and courtesy lamps are controlled
via ON/OFF switches. The ON/OFF switches are in
the lamp ground circuits. Voltage via the dome/cour-
tesy lamp fuse is applied directly to the lamp bulbs.
When either door is opened, the door pillar switch
contacts close and provide a direct path to vehicle
body ground.
The cargo/cargo and courtesy lamps can also be
turned on via the interior lamp illumination rheo-
stat.
DOME/COURTESY LAMP TROUBLE DIAGNOSIS
ALL LAMPS INOPERATIVE
(1) Rotate the headlamp switch rheostat clockwise.
The lamps should light. If not OK, remove, inspect
and test the dome lamp fuse. Replace if bad.
(2) If the fuse is OK, repair the open circuit in the
wire harness to vehicle body ground.
ONE LAMP INOPERATIVE
(1) Measure the resistance across the bulb holder
terminals. The ohmmeter should indicate zero ohms.
If not, replace the bulb.
(2) Measure the voltage between the voltage side
of the bulb holder and vehicle body ground. The volt-
meter should indicate battery voltage. If not, repair
the open circuit in the wire harness to the splice.
LAMPS INOPERATIVE WITH ONE OR MORE
DOORS OPENED
(1) Remove the inoperative switch from the door
pillar and connect the switch wire directly to ground.
The lamp should light.
(2) If not, check for an open circuit in black
(ground) wire. Repair as necessary. If lamps still do
not light, replace the switch.
LIGHTED VANITY MIRROR
SERVICE INFORMATIONÐXJ VEHICLES
Both the driver and the front passenger sunvisor
can be equipped with a lighted vanity mirror. A
lamp located at each side of the vanity mirror. The
lamps are switched ON automatically when the mir-
ror cover is lifted (Fig. 1).
Voltage is applied directly to the vanity lamp bulbs
via the dome lamp fuse.
LIGHTED VANITY MIRROR TROUBLE DIAGNOSIS
VANITY LAMPS INOPERATIVE
(1) Remove, inspect and test the dome lamp fuse.
Replace if defective.
(2) Test the dome lamp operation. If OK, go to the
next step. If not OK, repair the open circuit in the
wire harness from the splice.
Fig. 1 Lighted Vanity Mirror
JLAMPS 8L - 19