Page 473 of 1938

DOME LAMP
REMOVAL
(1) Insert a small, flat bladed pry tool between
dome lamp lens and dome lamp body on left side of
dome lamp.
(2) Disengage left side of dome lamp lens from
lamp body (Fig. 11).
(3) Pivot dome lamp lens downward until lens
hook is clear of headlining.
(4) Slide dome lamp toward right side of vehicle
until hook on dome lamp is clear of headlining (Fig.
12).
(5) Remove dome lamp from headlining.
(6) Disconnect wire connector from dome lamp.
(7) Remove dome lamp from vehicle.
INSTALLATION
(1) Position dome lamp in vehicle.
(2) Connect wire connector to dome lamp.
(3) Position dome lamp to headlining.
(4) Position hook on dome lamp above headlining
and slide lamp toward left side of vehicle until hook
on dome lamp is fully engaged to headlining.
(5) Push upward on dome lamp until dome lamp is
tight to headlining.
(6) Pivot dome lamp lens upward. Verify that lamp
lens hook is above the headlining.
(7) Install left side of dome lamp lens to lamp
body.
DOME LAMP BULB
REMOVAL
(1) Insert a small, flat bladed pry tool between
dome lamp lens and dome lamp body on left side of
dome lamp.
(2) Disengage left side of dome lamp lens from
lamp body (Fig. 13).
(3) Pull bulb from lamp socket
INSTALLATION
(1) Push bulb into lamp socket.
(2) Pivot dome lamp lens upward. Verify that lamp
lens hook is above the headlining.
(3) Engage left side of dome lamp lens to lamp
body.
FRONT DOOR COURTESY LAMP
REMOVAL
(1) Insert a trimstick between courtesy lamp hous-
ing and door trim panel (Fig. 14).
(2) Pry rear edge of housing from trim panel.
Fig. 11 Dome Lamp Lens
Fig. 12 Dome Lamp Hook
Fig. 13 Dome Lamp Bulb
NSLAMPS 8L - 21
REMOVAL AND INSTALLATION (Continued)
Page 474 of 1938
(3) Separate housing from trim panel.
(4) Disengage wire connector from lamp.
(5) Separate lamp housing from vehicle.
INSTALLATION
(1) Position lamp housing to vehicle.
(2) Engage wire connector to lamp.
(3) Slide tab on forward edge of housing behind
trim panel.
(4) Snap rear edge of housing into trim panel.
FRONT DOOR COURTESY LAMP BULB
REMOVAL
(1) Using a small, flat bladed pry tool, pry rear
edge of courtesy lamp lens from courtesy lamp (Fig.
15).
(2) Remove lens from lamp.
(3) Squeeze brass lamp bulb contacts together gen-
tly.(4) Disengage bulb from lamp contacts (Fig. 16).
(5) Remove bulb from lamp.
Fig. 14 Door Courtesy Lamp Housing
Fig. 15 Door Courtesy Lamp Lens
Fig. 16 Door Courtesy Lamp Bulb
8L - 22 LAMPSNS
REMOVAL AND INSTALLATION (Continued)
Page 475 of 1938

INSTALLATION
(1) Position bulb to lamp contacts.
(2) Engage bulb to lamp contacts.
(3) Insert long edge of lens into lamp housing.
(4) Press on center of lens to engage remainder of
clips
RAIL LAMP MODULE BULB
REMOVAL
(1) Using a small screw driver, pry stationary end
of rail lamp lens from rail lamp module (Fig. 17).
(2) Remove lens tab from between rail lamp mod-
ule and rail lamp switch.
(3) Remove lens from lamp.
(4) Pull bulb from lamp (Fig. 18).
INSTALLATION
(1) Push bulb into bulb contacts in rail lamp mod-
ule.
(2) Insert tab on lamp lens between rail lamp mod-
ule and rail lamp switch.(3) Snap lens onto lens pivots on module.
LIFTGATE COURTESY LAMP
REMOVAL
(1) Insert trim stick between courtesy lamp and
liftgate trim panel at upper inboard corner of cour-
tesy lamp (Fig. 19).
(2) Disengage tabs holding courtesy lamp to lift-
gate trim panel (Fig. 20).
(3) Disconnect wire connector from courtesy lamp.
(4) Remove lamp from vehicle.
INSTALLATION
(1) Position lamp to vehicle.
(2) Connect wire connector to courtesy lamp.
Fig. 17 Rail Lamp Module Lens
Fig. 18 Rail Lamp Module Bulb
Fig. 19 Courtesy Lamp
Fig. 20 Courtesy Lamp Tabs
NSLAMPS 8L - 23
REMOVAL AND INSTALLATION (Continued)
Page 476 of 1938
(3) Position courtesy lamp to liftgate trim panel.
(4) Press courtesy lamp into trim panel until tabs
engage fully to trim panel.
LIFTGATE COURTESY LAMP BULB
REMOVAL
(1) Remove liftgate courtesy lamp.
(2) Insert a small, flat bladed pry tool between
courtesy lamp lens and courtesy lamp body.
(3) Carefully depress tabs holding lens to courtesy
lamp body (Fig. 21).
(4) Remove lamp lens from lamp body.
(5) Carefully press lamp bulb contact toward oppo-
site contact.
(6) Remove bulb from lamp body.
INSTALLATION
(1) Carefully press lamp bulb contact toward oppo-
site contact.
(2) Position bulb to lamp bulb contacts.(3) Position long side of lamp lens to tabs on lamp
body.
(4) Press on center of lens to engage tabs on oppo-
site side of lamp body.
(5) Install liftgate courtesy lamp.
Fig. 21 Liftgate Courtesy Lamp Bulb
8L - 24 LAMPSNS
REMOVAL AND INSTALLATION (Continued)
Page 477 of 1938

BULB APPLICATION
INDEX
page page
GENERAL INFORMATION
INTRODUCTION......................... 25SPECIFICATIONS
EXTERIOR LAMP BULBS.................. 25
INTERIOR LAMP BULBS.................. 25
GENERAL INFORMATION
INTRODUCTION
The following Bulb Application Tables list the lamp
title on the left side of the column and trade number
or part number on the right.
CAUTION: Do not use bulbs that have a higher
candle power than the bulb listed in the Bulb Appli-
cation Table. Damage to lamp can result.
Do not touch halogen bulbs with fingers or other
possibly oily surfaces. Bulb life will be reduced.
If a halogen bulb is contaminated with oil, clean
bulb with denatured alcohol or ammonia based sol-
vent.
SPECIFICATIONS
EXTERIOR LAMP BULBS
LAMP BULB
Back-up...............................3057
CHMSL................................921
Fog Lamp...............................H3
FogLamp±T&C ........................9040
Headlamp..............................9007
Headlamp high beam ± T&C...............9005
Headlamp low beam ± T&C............9005 SLL
License Plate............................168
Parking/Turn Signal/Front Side Marker. . . .3157NA
Parking/Turn Signal ± T&C............4157NAK
Tail, Stop, Turn Signal and Side Marker......3057
Front Side Marker......................194NA
INTERIOR LAMP BULBS
LAMP BULB
ABS.................................PC194
AirBag ..............................PC194
Alarm Set (Security)....................PC194
Brake Warning.........................PC194
Center/Rear Reading Lamps.................578
Center/Rear Dome Lamps...................579
Check Engine Ind.......................PC194
Front Door Courtesy.......................567
Door Ajar Ind..........................PC194
Front Header Reading Lamp................567
Glove Box Lamp..........................194
High Beam Ind.........................PC194
Instrument Cluster.....................PC194
IP Bin/Ash Tray..........................161
Liftgate Flood Lamps......................567
Liftgate Ajar Ind.........................PC74
Low Fuel Ind..........................PC194
Oil Pressure Ind........................PC194
O/H Console Reading Lamps................579
Seat Belt Ind...........................PC74
Engine Temp Ind.......................PC194
Turn Signal...........................PC194
Engine Compartment Lamps................579
Visor Vanity Lamp....................6501966
Low Washer Fluid.......................PC74
Low Volts Warning.......................PC74
Cruise Indicator........................PC194
NSLAMPS 8L - 25
Page 478 of 1938
Page 479 of 1938

LAMPS
CONTENTS
page page
BULB APPLICATION..................... 17
HEADLAMP ALIGNMENT.................. 5
LAMP BULB SERVICE.................... 8LAMP DIAGNOSIS....................... 1
LAMP SERVICE........................ 13
LAMP DIAGNOSIS
INDEX
page page
GENERAL INFORMATION
HEADLAMP LEVELING MOTOR............. 2
INTRODUCTION........................ 1SAFETY PRECAUTIONS.................. 1
DIAGNOSIS AND TESTING
DIAGNOSTIC PROCEDURES.............. 2
GENERAL INFORMATION
INTRODUCTION
GS vehicles use lighting on the interior and exte-
rior of the vehicle for illuminating and indicating
purposes. Lighting circuits are protected by fuses.
Lighting circuits require an overload protected power
source, on/off device, lamps and body ground to oper-
ate properly. Plastic lamps require a wire in the har-
ness to supply body ground to the lamp socket.
Replace sockets and bulbs that are corroded.
Some of the interior and exterior lighting functions
are governed by the body controller. The headlamp,
dome, and the door ajar switches provide signals to
the body controller. The body controller in turn acti-
vates relay(s) in order to provide either a ground or
feed line to the appropriate lamp(s).
Wire connectors can make intermittent contact or
become corroded. Before coupling wire connectors,
inspect the terminals inside the connector. Male ter-
minals should not be bent or disengaged from the
insulator. Female terminals should not be sprung
open or disengaged from the insulator. Bent and
sprung terminals can be repaired using needle nose
pliers and pick tool. Corroded terminals appear
chalky or green. Corroded terminals should be
replaced to avoid recurrence of the problem symp-
toms.Begin electrical system failure diagnosis by testing
related fuses in the fuse block and power distribution
center. Verify that bulbs are in good condition and
test continuity of the circuit ground. Refer to Group
8W, Wiring Diagrams, for component location and cir-
cuit information.
SAFETY PRECAUTIONS
WARNING: EYE PROTECTION SHOULD BE USED
WHEN SERVICING GLASS COMPONENTS. PER-
SONAL INJURY CAN RESULT.
CAUTION: Do not touch the glass of halogen bulbs
with fingers or other possibly oily surface, reduced
bulb life will result.
Do not use bulbs with higher candle power than
indicated in the Bulb Application table at the end of
this group. Damage to lamp and/or Daytime Run-
ning Lamp Module can result.
Do not use fuses, circuit breakers or relays hav-
ing greater amperage value than indicated on the
fuse panel or in the Owners Manual.
When it is necessary to remove components to ser-
vice another, it should not be necessary to apply
excessive force or bend a component to remove it.
Before damaging a trim component, verify hidden
fasteners or captured edges are not holding the com-
ponent in place.
NS/GSLAMPS 8L - 1
Page 480 of 1938

HEADLAMP LEVELING MOTOR
This vehicle is equipped with a remote headlamp
leveling system. This system allows the driver to
adjust the vertical headlamp aim from the interior of
the vehicle to compensate for passenger or cargo
load. A headlamp leveling switch is located in the
instrument panel and controls the headlamp leveling
motor found on the back of the headlamp module.
DIAGNOSIS AND TESTING
DIAGNOSTIC PROCEDURES
When a vehicle experiences problems with the head-
lamp system, verify the condition of the battery connec-
tions, charging system, headlamp bulbs, wire
connectors, relay, high beam dimmer switch and head-
lamp switch. Refer to Group 8W, Wiring Diagrams, for
component locations and circuit information.
HEADLAMP DIAGNOSIS
CONDITION POSSIBLE CAUSES CORRECTION
HEADLAMPS ARE DIM
WITH ENGINE IDLING OR
IGNITION TURNED OFF1. Loose or corroded battery cables. 1. Clean and secure battery cable clamps
and posts.
2. Loose or worn alternator drive
belt.2. Adjust or replace alternator drive belt.
3. Charging system output too low. 3. Test and repair charging system. Refer
to Group 8A.
4. Battery has insufficient charge. 4. Test battery state-of -charge. Refer to
Group 8A.
5. Battery is sulfated or shorted. 5. Load test battery. Refer to Group 8A.
6. Poor lighting circuit Z1-ground. 6. Test for voltage drop across Z1-ground
locations. Refer to Group 8W.
HEADLAMP BULBS BURN
OUT FREQUENTLY1. Charging system output too high. 1. Test and repair charging system. Refer
to Group 8A.
2. Loose or corroded terminals or
splices in circuit.2. Inspect and repair all connectors and
splices. Refer to Group 8W.
HEADLAMPS ARE DIM
WITH ENGINE RUNNING
ABOVE IDLE1. Charging system output too low. 1. Test and repair charging system. Refer
to Group 8A.
2. Poor lighting circuit Z1-ground. 2. Test for voltage drop across Z1-ground
locations. Refer to Group 8W.
3. High resistance in headlamp
circuit.3. Test amperage draw of headlamp circuit.
HEADLAMPS FLASH
RANDOMLY1. Poor lighting circuit Z1-ground. 1. Test for voltage drop across Z1-ground
locations, refer to Group 8W.
2. High resistance in headlamp
circuit.2. Test amperage draw of headlamp circuit.
3. Loose or corroded terminals or
splices in circuit.3. Inspect and repair all connectors and
splices. Refer to Group 8W.
HEADLAMPS DO NOT
ILLUMINATE1. No voltage to headlamps. 1. Repair open headlamp circuit. Refer to
Group 8W.
2. No Z1-ground at headlamps. 2. Repair circuit ground. Refer to Group
8W.
3. Faulty headlamp switch. 3. Replace headlamp switch.
4. Faulty headlamp dimmer
(multi-function) switch.4. Replace multi-function switch.
5. Broken connector terminal or wire
splice in headlamp circuit.5. Repair connector terminal or wire splice.
6. Defective or burned out bulb. 6. Replace bulb.
7. Body controller malfunction. 7. Refer to appropriate body controller
diagnostics.
8L - 2 LAMPSNS/GS
GENERAL INFORMATION (Continued)