(2) Rotate bulb socket counterclockwise one quar-
ter turn (Fig. 7).
(3) Pull bulb socket from halo lamp.
INSTALLATION
(1) Push bulb socket into halo lamp.
(2) Rotate bulb socket clockwise one quarter turn.
(3) Install steering column trim covers. Refer to
Group 19, Steering, for proper procedures.
CONVENIENCE BIN LAMP
If the lamp is not used refer to (Fig. 8).
REMOVAL
(1) Pull out the convenience bin cup holder.
(2) Insert the trim stick between access cover
above cup holder and center console.
(3) Carefully pry the access cover from the center
console (Fig. 9).
(4) Remove the access cover from the vehicle.(5) Using needle-nose pliers, carefully squeeze the
vertical metal legs of the lamp hood.
(6) Lift the lamp hood upward from the cup holder
tray.
(7) Carefully pull the lamp and wiring rearward
from the instrument panel (Fig. 10).
(8) Pull the lamp hood from the lamp socket.
(9) Pull bulb from socket.
INSTALLATION
For installation, reverse the above procedures.
INSTRUMENT PANEL LAMPS AND SWITCHES
For replacement of instrument panel lamps and
switches, refer to Group 8E, Instrument Panel and
Systems.
Fig. 6 Glove Box Lamp Bulb
Fig. 7 Ignition Halo Lamp Bulb
Fig. 8 Wiring for the Convenience Lamp
Fig. 9 Convenience Bin Access Cover
Fig. 10 Convenience Bin Lamp Bulb
8L - 20 LAMPSNS
REMOVAL AND INSTALLATION (Continued)
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
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)
HEADLAMP LEVELING MOTOR DIAGNOSIS
CONDITION POSSIBLE CAUSES CORRECTION
ONE MOTOR DOES NOT
OPERATE1. Poor connection at motor. 1. Secure connector on motor.
2. No voltage at motor. 2. Repair circuit. Refer to Group 8W,
Wiring.
3. Defective motor. 3. Replace motor.
BOTH MOTORS DO NOT
OPERATE1. No voltage at headlamp leveling
switch.1. Repair circuit or replace fuse.
Refer to Group 8W, Wiring.
2. No voltage at both motors. 2. Repair circuit or replace fuse.
Refer to Group 8W, Wiring.
3. Poor connection at motors. 3. Secure connectors on motors.
4. Both motors defective. 4. Replace motors.
8L - 4 LAMPSNS/GS
DIAGNOSIS AND TESTING (Continued)
LAMP SERVICE
INDEX
page page
GENERAL INFORMATION
HEADLAMP DIMMER SWITCH............. 13
HEADLAMP SWITCH.................... 13
REMOVAL AND INSTALLATION
CENTER HIGH MOUNTED STOP LAMP
(CHMSL)............................ 16FOG LAMP............................ 14
HEADLAMP LEVELING MOTOR............ 14
HEADLAMP MODULE................... 13
LICENSE PLATE LAMP.................. 15
SIDE REPEATER LAMP.................. 14
TAIL LAMP............................ 15
GENERAL INFORMATION
HEADLAMP SWITCH
Service procedures for the headlamp switch can be
found in Group 8E, Instrument Panel and Gauges.
More information can be found in Group 8W, Wiring
Diagrams.
HEADLAMP DIMMER SWITCH
The headlamp dimmer switch is incorporated into
the multi-function (turn signal) switch. Proper proce-
dures can be found in Group 8J, Turn Signal and
Flashers. More information can be found in Group
8W, Wiring Diagrams.
REMOVAL AND INSTALLATION
HEADLAMP MODULE
REMOVAL
(1) Release hood latch and open hood.
(2) Remove bolt holding headlamp module to radi-
ator closure panel (Fig. 1).
(3) From behind the radiator closure panel, remove
the nuts holding the headlamp module to the radia-
tor closure panel.
(4) Separate headlamp module from radiator clo-
sure panel.
(5) Disengage wire connector from headlamp bulb.
(6) Disengage wire connector from headlamp level-
ing motor.
(7) Disengage wire connector for front turn signal
and citylight lamps.(8) Separate headlamp module from vehicle.
INSTALLATION
(1) Position headlamp module to vehicle.
(2) Engage wire connector for front turn signal and
citylight lamps.
(3) Engage wire connector to headlamp leveling
motor.
(4) Engage wire connector to headlamp bulb.
(5) Position headlamp module to radiator closure
panel.
(6) Press headlamp module rearward until module
is fully seated onto mounting studs.
(7) Install nuts to hold headlamp module to radia-
tor closure panel.
(8) Verify lamp operation.
Fig. 1 Headlamp Module
NS/GSLAMPS 8L - 13
(6) Separate license plate lamp bar from liftgate
(Fig. 9).
(7) Separate license plate lamp bar grommet from
vehicle.
INSTALLATION
(1) Route wire connector through hole in liftgate.
(2) Install grommet to wiring harness hole in lift-
gate.
(3) Place license plate lamp bar in position on lift-
gate.
(4) Install screws to hold license plate lamp bar to
liftgate.
(5) Engage wire connector into liftgate wire har-
ness.
(6) Install water shield.
(7) Install liftgate trim panel.(8) Verify license plate lamp operation.
CENTER HIGH MOUNTED STOP LAMP (CHMSL)
REMOVAL
(1) Release liftgate latch and open liftgate.
(2) Disengage clip holding CHMSL access cover to
liftgate.
(3) Separate cover from liftgate.
(4) Depress plastic tab holding bulb holder to lamp
housing (Fig. 10).
(5) Separate bulb holder from lamp housing.
(6) Remove screws holding CHMSL to liftgate.
(7) Separate CHMSL from vehicle.
INSTALLATION
(1) Place CHMSL in position on vehicle.
(2) Install screws to hold CHMSL to liftgate.
(3) Position bulb holder to CHMSL housing.
(4) Snap bulb holder into CHMSL housing.
(5) Place CHMSL access cover in position on lift-
gate.
(6) Engage clip to hold access cover to liftgate.
(7) Verify CHMSL operation.
Fig. 9 License Plate Lamp
Fig. 10 CHMSL Bulb Holder
8L - 16 LAMPSNS/GS
REMOVAL AND INSTALLATION (Continued)
ACM monitors the system to determine the system
readiness. The ACM contains on-board diagnostics
and will light the AIRBAG warning lamp in the mes-
sage center when a problem occurs.
The driver and passenger airbag system is a safety
device designed to reduce the risk of fatality or seri-
ous injury, caused by a frontal impact of the vehicle.
The impact sensor provides verification of the
direction and severity of the impact. One impact sen-
sor is used. It is located inside the Airbag Control
Module (ACM) which is mounted on a bracket, just
forward of the center console. The impact sensor is
an accelerometer that senses deceleration. The decel-
eration pulses are sent to a microprocessor which
contains a decision algorithm. When an impact is
severe enough to require airbag protection, the ACM
micro processor sends a signal that completes the
electrical circuit to the driver and passenger airbags.
The sensor is calibrated for the specific vehicle and
reacts to the severity and direction of the impact.
CLOCKSPRING
The clockspring is snapped into a plastic mounting
platform on the steering column behind the steering
wheel. The clockspring is used to maintain a contin-
uous electrical circuit between the wiring harness
and the driver's airbag module. This assembly con-
sists of a flat ribbon like electrically conductive tape
which winds and unwinds with the steering wheel
rotation.
DRIVER AND PASSENGER AIRBAG MODULES
The Driver Airbag Module is located in the center
of the steering wheel. The Passenger Airbag Module
is located in the instrument panel above the glove
box (Fig. 1). The Driver Airbag Module cover contains
the horn switch, inflator device, and a fabric bag. The
airbag cover/horn switch is serviced separately from
the inflator and bag components. Refer to Group 8G,
Horns for proper service procedure for horn switch.
The Passenger Airbag Module is serviced as an
assembly.
WARNING: WHEN THE AIRBAG SYSTEM IS
DEPLOYED BECAUSE OF A COLLISION, THE FOL-
LOWING MUST BE REPLACED:
²COMPLETE STEERING COLUMN ASSEMBLY
²LOWER STEERING COUPLER
²STEERING WHEEL
²STEERING COLUMN CLOCKSPRING
²DRIVER AIRBAG COVER/HORN SWITCH
²DRIVER AIRBAG MODULE
²PASSENGER AIRBAG MODULE
²UPPER INSTRUMENT PANEL WITH PAD
DIAGNOSIS AND TESTING
AIRBAG SYSTEM TEST
(1) Disconnect and isolate the battery negative
cable.
WARNING: DISCONNECT AND ISOLATE THE BAT-
TERY NEGATIVE CABLE BEFORE BEGINNING AIR-
BAG SYSTEM COMPONENT SERVICE
PROCEDURES. THIS WILL DISABLE THE AIRBAG
SYSTEM. FAILURE TO DISCONNECT THE BATTERY
COULD RESULT IN ACCIDENTAL AIRBAG DEPLOY-
MENT AND POSSIBLE PERSONAL INJURY. ALLOW
SYSTEM CAPACITOR TO DISCHARGE FOR TWO
MINUTES BEFORE REMOVING AIRBAG COMPO-
NENTS.
(2) Connect scan tool (DRB) to Data Link connec-
tor, located at left side of the steering column and at
the lower edge of the lower instrument panel.
(3) Turn the ignition key to ON position. Exit vehi-
cle with scan tool. Use the latest version of the
proper cartridge.
(4) After checking that no one is inside the vehicle,
connect the battery negative terminal.
(5) Using the scan tool, read and record active
diagnostic code data.
(6) Read and record any stored diagnostic codes.
(7) Refer to the proper Body Diagnostic Procedures
Manual if any diagnostic codes are found in Step 5 or
Step 6.
(8) Erase stored diagnostic codes if there are no
active diagnostic codes. If problems remain, diagnos-
tic codes will not erase. Refer to the Passive
Restraint Diagnostic Test Manual to diagnose the
problem.If airbag warning lamp either fails to
light, or goes on and stays on, there is a system
malfunction. Refer to the proper Body Diagnos-
tic Procedures Manual to diagnose the problem.
Fig. 1 Airbag Module Locations
8M - 2 RESTRAINT SYSTEMNS
DESCRIPTION AND OPERATION (Continued)
CLOCKSPRING
WARNING: DISCONNECT AND ISOLATE THE BAT-
TERY NEGATIVE CABLE BEFORE BEGINNING AIR-
BAG SYSTEM COMPONENT SERVICE
PROCEDURES. THIS WILL DISABLE THE AIRBAG
SYSTEM. FAILURE TO DISCONNECT THE BATTERY
COULD RESULT IN ACCIDENTAL AIRBAG DEPLOY-
MENT AND POSSIBLE PERSONAL INJURY. ALLOW
SYSTEM CAPACITOR TO DISCHARGE FOR TWO
MINUTES BEFORE REMOVING AIRBAG COMPO-
NENTS.
REMOVAL
(1) Position steering wheel and front wheels
straight ahead.
(2) Release hood latch and open hood.
(3) Disconnect and isolate battery negative cable.
Allow at least two minutes for the reserve capacitor
in the ACM to discharge.
(4) Remove driver airbag from steering wheel (Fig.
7).
(5) Disconnect wire connectors from back of airbag
module.
(6) Remove steering wheel (Fig. 8).
(7) Remove steering column shrouds (Fig. 9).
(8) Disconnect 2-way and 4-way connectors
between the clockspring and the instrument panel
wiring harness.
(9) Remove clockspring from housing assembly by
depressing the two tabs on the clockspring (Fig. 10)
INSTALLATION
For installation, reverse the above procedures. Do
not connect battery negative cable. Refer to Diagno-
sis and Testing for Airbag System Test procedures.
DRIVER AIRBAG MODULE
WARNING: DISCONNECT AND ISOLATE THE BAT-
TERY NEGATIVE CABLE BEFORE BEGINNING AIR-
BAG SYSTEM COMPONENT SERVICE
PROCEDURES. THIS WILL DISABLE THE AIRBAG
SYSTEM. FAILURE TO DISCONNECT THE BATTERY
COULD RESULT IN ACCIDENTAL AIRBAG DEPLOY-
MENT AND POSSIBLE PERSONAL INJURY. ALLOW
SYSTEM CAPACITOR TO DISCHARGE FOR TWO
MINUTES BEFORE REMOVING AIRBAG COMPO-
NENTS.Fig. 7 Airbag/Horn Switch
Fig. 8 Steering Wheel
Fig. 9 Airbag Clockspring
NSRESTRAINT SYSTEM 8M - 5
REMOVAL AND INSTALLATION (Continued)