JEEP YJ 1995 Service And Repair Manual

FOG LAMP DIAGNOSIS
JLAMPSÐYJ VEHICLES 8L - 21

SERVICE PROCEDURES
INDEX
page page
Back-Up/Rear Turn Signal/Tail Lamp Bulb
ReplacementÐYJ....................... 28
Center High Mounted Stop Lamp (CHMSL)ÐYJ . . 28
Daytime Running Lights (Canada Only)ÐYJ..... 30
Drl Module ReplacementÐYJ................ 30
Fog Lamp ReplacementÐYJ................. 25
Fog Lamp Switch ReplacementÐYJ........... 26
Fog LampsÐYJ.......................... 23
Front Park/Turn Signal Lamp Bulb ReplacementÐ
YJ ................................... 25
Headlamp Alignment PreparationÐYJ.......... 22Headlamp AlignmentÐYJ................... 22
Headlamp Bulb ReplacementÐYJ............. 23
Headlamp Dimmer Switch ReplacementÐYJ..... 26
Headlamp SwitchÐYJ...................... 26
Headlamp/Fog Lamp Adjustment Using Alignment
ScreenÐYJ............................ 23
Side Marker Lamp Bulb ReplacementÐYJ....... 25
Underhood Lamp Bulb ReplacementÐYJ....... 29
Underhood Lamp ReplacementÐYJ........... 29
Underhood Lamp Service InformationÐYJ....... 28
HEADLAMP ALIGNMENTÐYJ
Headlamps can be aligned using the screen method
provided in this section. Alignment Tool C4466-A or
equivalent can also be used. Refer to instructions
provided with the tool for proper procedures.The
preferred headlamp alignment setting is 0 for
the left/right adjustment and 1(down for the
up/down adjustment.
HEADLAMP ALIGNMENT PREPARATIONÐYJ
(1) Verify headlamp dimmer switch and high beam
indicator operation.
(2) Correct defective components that could hinder
proper headlamp alignment.
(3) Verify proper tire inflation.
(4) Clean headlamp lenses.
(5) Verify that luggage area is not heavily loaded.
(6) Fuel tank should be FULL. Add 2.94 kg (6.5
lbs.) of weight over the fuel tank for each estimated
gallon of missing fuel.
Fig. 1 Headlamp Alignment ScreenÐTypical
8L - 22 LAMPSÐYJ VEHICLESJ

HEADLAMP/FOG LAMP ADJUSTMENT USING
ALIGNMENT SCREENÐYJ
ALIGNMENT SCREEN PREPARATION
(1) Position vehicle on a level surface perpendicu-
lar to a flat wall 7.62 meters (25 ft) away from front
of headlamp lens (Fig. 1).
(2) If necessary, tape a line on the floor 7.62
meters (25 ft) away from and parallel to the wall.
(3) Measure from the floor up 1.27 meters (5 ft)
and tape a line on the wall at the centerline of the
vehicle. Sight along the centerline of the vehicle
(from rear of vehicle forward) to verify accuracy of
the line placement.
(4) Rock vehicle side-to-side three times to allow
suspension to stabilize.
(5) Jounce front suspension three times by pushing
downward on front bumper and releasing.
(6) Measure the distance from the center of head-
lamp lens to the floor. Transfer measurement to the
alignment screen (with tape). Use this line for up/
down adjustment reference.
(7) Measure distance from the centerline of the ve-
hicle to the center of each headlamp being aligned.
Transfer measurements to screen (with tape) to each
side of vehicle centerline. Use these lines for left/
right adjustment reference.
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 (Fig. 2) until
the headlamp beam pattern on screen/wall is similar
to the pattern depicted in Figure 1.
When using a headlamp aiming screen:
²Adjust the headlamps so that the beam horizontal
position is at 0.
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 1.
(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.
FOG LAMP ADJUSTMENT
Prepare an alignment screen. Refer to Alignment
Screen Preparation paragraph in this section. A prop-
erly aligned fog lamp will project a pattern on the
alignment screen 100 mm (4 in.) below the fog lamp
centerline and straight ahead (Fig. 3)
HEADLAMP BULB REPLACEMENTÐYJ
(1) Remove the screws and the headlamp bezel
(Fig. 4).
(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.
FOG LAMPSÐYJ
Fog lamps are turned OFF by the circuit relay
when the high beam driving lamps are turned ON.
Fog lamps may be operated ONLY when low beam
headlamps are ON. If the headlamps are switched to
high beam, the low beam lamps and fog lamps will
turn OFF. The fog lamps will go back on when the
high beams are switched OFF.
The indicator lamp on the fog lamp switch will go:
²OFF when the high beams lamps are switched
ON.
²ON when the high beam lamps are switched OFF.
FOG LAMP BULB REPLACEMENT
CAUTION: Do not touch the bulb glass with fingers
or other oily surfaces. Reduced bulb life will result.
(1) Remove the screws that attach the stone shield
and the reflector to the lamp housing. Remove the
stone shield and reflector from the lamp housing
(Fig. 5).
(2) Remove the bulb/element holder from the lens/
reflector.
Fig. 2 Headlamp Beam Adjustment Screws
JLAMPSÐYJ VEHICLES 8L - 23

(3) Remove the bulb/element from the holder.
INSTALLATION
(1) Use a clean cloth to install a replacement bulb
holder.(2) Install the bulb holder in the lens/reflector.
(3) Position the stone shield and reflector on the
lamp housing. Install the screws that attach the
stone shield and the reflector to the lamp housing.
Tighten the screws securely.
Fig. 3 Fog Lamp AlignmentÐTypical
Fig. 4 Headlamp Components
Fig. 5 Fog Lamp
8L - 24 LAMPSÐYJ VEHICLESJ

FOG LAMP REPLACEMENTÐYJ
REMOVAL
(1) Disconnect the fog lamp wire harness connec-
tor.
(2) Remove the fog lamp nut(s), washers(s) and
bolt(s) from the support bracket (Fig. 5 and 6).
(3) Remove the fog lamp from the support bracket.
INSTALLATION
(1) Position the fog lamp on the support bracket.
(2) Install the fog lamp bolt(s), washer(s) and
nut(s) in the support bracket.
(3) Connect the fog lamp wire harness connector.
FRONT PARK/TURN SIGNAL LAMP BULB
REPLACEMENTÐYJ
REMOVAL
(1) Remove the park/turn signal lamp housing
screws (Fig. 7).
(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.
INSTALLATION
(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.
SIDE MARKER LAMP BULB REPLACEMENTÐYJ
REMOVAL
(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. 8).
(2) Remove the bulb from the socket by pulling it
straight outward.
INSTALLATION
(1) Install a replacement bulb in the socket.
(2) Install the bulb and socket in the side marker
lamp housing (Fig. 8).
Fig. 6 Rectangular-Shaped Fog Lamp
Fig. 7 Park/Turn Signal Lamp Bulb Replacement
Fig. 8 Side Marker Lamp Bulb
JLAMPSÐYJ VEHICLES 8L - 25

HEADLAMP SWITCHÐYJ
To remove or replace the headlamp switch, refer to
Group 8E, Instrument Panel and Gauges.
FOG LAMP SWITCH REPLACEMENTÐYJ
REMOVAL
The fog lamp switch is located on the instrument
panel at the right of the steering column. The fog
lamp circuit relay is located below the left headlamp.
(1) Disconnect the battery negative cable.
(2) Remove the I/P shroud retaining screws (Fig. 9).
(3) Move the I/P shroud toward the steering wheel.
(4) Apply upward force to the I/P shroud and
downward force to the indicator panel. This will re-
lease the indicator panel holding tabs (Fig. 10).
(5) Remove the shroud from the instrument panel.
(6) Remove the fog lamp switch retaining screws.
(7) Disconnect the wire harness connector from the
fog lamp switch.
(8) Remove the fog lamp switch from the instru-
ment panel cavity.
INSTALLATION
(1) Position the fog lamp switch in the instrument
panel cavity and connect the wire harness connector
to the switch.
(2) Install the fog lamp switch retaining screws.
Tighten the screws securely.
(3) Position the I/P shroud under the steering col-
umn.
(4) Slide the indicator panel holding tabs into the
shroud notches.
(5) Place the assembled I/P shroud over the indica-
tor lamp foam gasket.The foam gasket located on the back side of
the indicator panel overlay is fragile. If it is ei-
ther torn or distorted, replace it.
(6) Install and tighten the indicator panel retain-
ing screws.
(7) Install the remaining shroud screws. Tighten
the screws securely.
(8) Connect the battery negative cable.
HEADLAMP DIMMER SWITCH REPLACEMENTÐYJ
REMOVAL
(1) Disconnect battery negative cable.
(2) Remove the I/P shroud retaining screws (Fig.
11).
(3) Move the I/P shroud toward the steering wheel
and apply upward force to the I/P shroud and down-
ward force to the indicator panel. This will release
the indicator panel holding tabs (Fig. 12).
(4) Remove the shroud from the instrument panel.
(5) Support the A/C evaporator housing.
(6) Remove the A/C evaporator housing-to-instru-
ment panel screws (Fig. 13).
(7) Remove the A/C evaporator housing support
bracket screw.
(8) Remove the support and lower the A/C evapo-
rator housing.
(9) Disconnect the dimmer switch wire harness
connector.
(10) Tape the dimmer switch actuator rod to the
steering column.
Fig. 9 Instrument Panel Shroud
Fig. 10 Indicator Panel Holding Tabs
8L - 26 LAMPSÐYJ VEHICLESJ

(11) Remove the dimmer switch screws and detach
the switch from the rod.
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 diam-
eter drill bit into the adjustment hole (Fig. 14).
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.
²Re-adjust the switch, if necessary.
(4) Position the I/P shroud under the steering col-
umn.
(5) Slide the indicator panel holding tabs (Fig. 12)
into the shroud notches;
(6) Place the assembled I/P shroud over the indica-
tor lamp gasket.
(7) Install and tighten screws.
(8) Install and tighten remaining shroud screws.
Fig. 11 Instrument Panel Shroud
Fig. 12 Indicator Panel Holding Tabs
Fig. 13 A/C Evaporator Housing
Fig. 14 Headlamp Dimmer Switch Adjustment
JLAMPSÐYJ VEHICLES 8L - 27

(9) Raise and support the A/C evaporator housing
(Fig. 13).
(10) Install the evaporator housing-to-instrument
panel screws and evaporator support bracket screw.
BACK-UP/REAR TURN SIGNAL/TAIL LAMP BULB
REPLACEMENTÐYJ
REMOVAL
(1) Remove the lens retaining screws from the tail
lamp housing (Fig. 15).
(2) Separate the lens from the tail lamp housing.
(3) Remove the bulb from the lamp socket.
INSTALLATION
(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.
CENTER HIGH MOUNTED STOP LAMP (CHMSL)Ð
YJ
The CHMSL is mounted on top of a bracket that
attaches to the spare tire carrier (Fig. 16).
(1) Remove the CHMSL lens (Fig. 17).
(2) Remove CHMSL lamp housing (Fig. 18)(5) Replace bulbs if necessary.
To install, reverse removal procedure.
UNDERHOOD LAMP SERVICE INFORMATIONÐYJ
When equipped, the underhood lamp is installed on
the hood right, rear inner panel (Fig. 19). The lamp
is illuminated when the hood is opened. The switch
Fig. 15 Back-up/Rear Turn Signal/Tail Lamp Bulb
Replacement
Fig. 16 Center High Mounted Stop Lamp (CHMSL) Bracket Assembly
8L - 28 LAMPSÐYJ VEHICLESJ

provides automatic ON/OFF functions each time the
hood is opened and closed.
UNDERHOOD LAMP BULB REPLACEMENTÐYJ
REMOVAL
(1) Disconnect the wire harness connector from the
underhood lamp (Fig. 20).
(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 REPLACEMENTÐYJ
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.
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.
Fig. 17 Removing CHMSL Access Door
Fig. 18 Replacing CHMSL Bulb
Fig. 19 Underhood Lamp
Fig. 20 Underhood Lamp Components
JLAMPSÐYJ VEHICLES 8L - 29

(3) Insert a replacement bulb in the lamp base
socket and rotate it clockwise.
(4) Connect the wire harness connector to the
lamp.
DAYTIME RUNNING LIGHTS (CANADA ONLY)ÐYJ
The Daytime Running Lights (Headlamps) System
is installed on vehicles manufactured for sale in Can-
ada only. The headlamps are illuminated when the
ignition switch is turned to the ON position. The
DRL module receives a vehicle-moving signal from
the vehicle speed sensor. This provides a constant
headlamps-oncondition as long as the vehicle is
moving. The lamps are illuminated at less than 50
percent of normal intensity.
DRL MODULE REPLACEMENTÐYJ
REMOVAL
The daytime running light module is located on the
left fender inner panel below the engine air cleaner
housing.
(1) Remove the engine air cleaner housing for ac-
cess to the DRL module.
(2) Disconnect the wire harness connector from the
module.
(3) Remove the screws that attach the module to
the fender inner panel (Fig. 21).(4) Remove the module from the fender inner
panel.
INSTALLATION
(1) Position the DRL module on the left, fender in-
ner panel.
(2) Install the attaching screws. Tighten the
screws securely.
(3) Connect the wire harness connector to the mod-
ule.
(4) Install the air cleaner housing.
Fig. 21 Daytime Running Lamp Module
8L - 30 LAMPSÐYJ VEHICLESJ