
take advantage of low current switching require-
ments in the vehicle. It is plugged into the Junction
Block at positions 4 (Fig. 1) where all wiring associ-
ated with its operation is terminated. The Junction
Block is adjacent to and left of the steering column of
the vehicle.
To gain access to the device, remove the lower
steering column cover and knee blocker, refer to
Group 8E, Instrument Panel and Systems.
The combination flasher may be operated in its
hazard warning mode either with or without the igni-
tion circuit being active. However, in order to operate
in the turn signal mode, the ignition circuit must be
completed to the module.
While the combination flasher is idle, there is no
current drawn through the module. The device does
not become active until a signal ground circuit is
supplied to either of the turn signal inputs or the
hazard warning input.
Typical flash rate for the flasher is 90 flashes per
minute.
When a lamp is burnt out for a given side of the
vehicle or a wire is open to a lamp, the flash rate will
increase to 180 flashes per minute when in the turn
signal mode. When in the hazard warning signal
mode the flash rate remains at 90 flashes per
minute.
Turn signal inputs that actuate the flasher are low
current grounds, each drawing a maximum of 300
mA., and are provided to the flasher through the
Junction Block from the multi-function switch that is
mounted to the steering column. The hazard warning
signal input is a low current ground drawing a max-
imum of 600 mA. through the multi-function switch.
COMBINATION FLASHER / DAYTIME RUNNING
LAMPS (DRL) MODULE
The Combination Flasher/DRL is a module provid-
ing turn signal, hazard warning, and daytime run-
ning light functions, and has been designed with
internal relays to take advantage of low current
switching requirements in the vehicle. It is plugged
into the junction block at positions 3 AND 4 (Fig. 2)
where all wiring associated with its operation is ter-
minated. The Junction Block is adjacent to and left of
the steering column of the vehicle.
To gain access to the device, remove the lower
steering column cover and knee blocker, refer to
Group 8E, Instrument Panel and Gauges.
The combination flasher/DRL may be operated in
its hazard warning mode either with or without the
ignition circuit being active. However, in order to
operate in the turn signal mode or the DRL mode,
the ignition circuit must be completed to the module.
While the combination flasher portion is idle, there
is no current drawn through the module. The devicedoes not become active in the turn signal or hazard
warning modes until a signal ground circuit is sup-
plied to either of the turn signal inputs or the hazard
warning input. With the ignition OFF, there is no
current drawn through the module.
While the ignition is ON, the front turn signal fil-
aments are illuminated steadily thus providing the
DRL function. The DRL function may be inhibited by
applying a signal ground input from either the park
brake circuit or the headlamp relay activation circuit.
Typical flash rate for the flasher is 90 flashes per
minute.
When a lamp is burnt out for a given side of the
vehicle or a wire is open to a lamp, the flash rate will
increase to 180 flashes per minute when in the turn
signal mode. When in the hazard warning signal
mode the flash rate remains at 90 flashes per
minute.
Turn signal inputs that actuate the flasher are low
current grounds, each could draw a maximum of 300
mA., and are provided to the flasher through the
Junction Block from the multi-function switch that is
mounted to the steering column. The hazard warning
signal input is a low current ground that could draw
a maximum of 600 mA. through the multi-function
switch.
DIAGNOSIS AND TESTING
TURN SIGNAL MULTI-FUNCTION SWITCH
To test turn signal, headlamp beam select and opti-
cal horn portion of the multi-function switch:
(1) Remove the multi-function switch, refer to
removal procedures.
(2) Using an ohmmeter check continuity reading
between multi-function switch pins. Refer to (Fig. 3)
for proper pin numbers and Turn Signal Multi-Func-
tion Switch Test chart.
Fig. 2 Junction Block Terminal Pins
8J - 2 TURN SIGNAL AND FLASHERSNS
DESCRIPTION AND OPERATION (Continued)

CONDITION POSSIBLE CAUSES CORRECTION
TURN SIGNAL AND HAZARD
WARNING FLASHERS
FUNCTION PROPERLY BUT
DAYTIME RUNNING LIGHTS
(DRL) DO NOT COME ON WHILE
DRIVING
(The brake lamp in the message
center remains illuminated under
the circumstances noted to the
right in step #3.0 through 3.5
unless the lamp is burned out.)
(Headlamps, either low or high
beam, remain illuminated under
the circumstances noted to the
right in step #4.0 through 4.3 even
though the headlamp switch is
OFF.)1. FAULTY GROUND FEED TO
JUNCTION BLOCK FROM
GROUND STUD CONNECTOR
THROUGH I/P HARNESS.
2. FAULTY GROUND FEED
THROUGH JUNCTION BLOCK TO
CAVITY #11 IN POSITION #3 OF
THE JUNCTION BLOCK.
3.0. FAULTY PARK BRAKE
SWITCH.
3.1. PARK BRAKE INPUT CIRCUIT
FALSELY GROUNDED. COULD BE
THE G09 CIRCUIT WHICH IS A
(20) GA. GY/BK WIRE BETWEEN
THE MESSAGE CENTER AND THE
JUNCTION BLOCK,
3.2. OR BETWEEN THE PARK
BRAKE SWITCH AND THE
JUNCTION BLOCK,
3.3. OR BETWEEN THE BRAKE
PRESSURE SWITCH AND THE
JUNCTION BLOCK,
3.4. OR BETWEEN THE IGNITION
SWITCH AND THE JUNCTION
BLOCK,
3.5. OR A SHORTED IGNITION
SWITCH (CONTACT SHOULD
ONLY BE MADE WHEN IN START
POSITION).
4.0. L93 CIRCUIT FALSELY
GROUNDED BETWEEN JUNCTION
BLOCK AND MULTI-FUNCTION
SWITCH.
4.1. L307 CIRCUIT FALSELY
GROUNDED BETWEEN
HEADLAMP SWITCH AND BODY
CONTROL MODULE.
4.2. HEADLAMP SWITCH
SHORTED.
4.3. HEADLAMP CONTROL
OUTPUT FALSELY GROUNDED BY
BODY CONTROL MODULE.1. REPLACE GROUND CIRCUIT TO
JUNCTION BLOCK.
2. REPLACE JUNCTION BLOCK.
3.0. REPLACE THE PARK BRAKE
SWITCH.
3.1-3.4. REPAIR THE G09 CIRCUIT
TO ELIMINATE THE FALSE
GROUND SOURCE.
3.5. REPLACE IGNITION SWITCH.
4.0. REPAIR OR REPLACE FAULTY
WIRING CONNECTION BETWEEN
JUNCTION BLOCK AND MULTI-
FUNCTION SWITCH.
4.1. REPAIR OR REPLACE FAULTY
WIRING CONNECTION BETWEEN
HEADLAMP SWITCH AND BODY
CONTROL MODULE.
4.2. REPLACE SHORTED
HEADLAMP SWITCH.
4.3. REPLACE BODY CONTROL
MODULE.
8J - 10 TURN SIGNAL AND FLASHERSNS
DIAGNOSIS AND TESTING (Continued)

(2) Place the wiper unit on a suitable work sur-
face.
(3) Remove nuts holding the cowl cover brackets to
the wiper unit.
(4) Remove cowl cover brackets from the wiper
unit.
(5) Remove nuts holding linkage and motor mount
plate to the wiper unit (Fig. 15).
(6) Remove the wiper linkage from the wiper unit.
(7) Disconnect the wire connectors from back of
the wiper motor (Fig. 16).
INSTALLATION
For installation, reverse the above procedure.
CLEANING AND INSPECTION
WIPER BLADES
Wiper blades exposed to the weather for a long
period of time tend to lose their wiping effectiveness.Periodic cleaning of the wiper blade is recommended
to remove the accumulation of salt and road grime.
The wiper blades, arms and windshield should be
cleaned with a sponge or cloth and a mild detergent
or nonabrasive cleaner. If the wiper blades continue
to streak or smear, they should be replaced. The
wiper blade should run smoothly across the wind-
shield in both directions. The wiper blade should
slightly roll over center when the blade reverses
direction. A wiper blade insert that has lost flexibility
or a wiper arm that has lost spring tension, will
cause the blade to skip or chatter across the wind-
shield. If the wiper blades are new and the wiper
arm spring tension is OK and a chattering sound is
emitted from the wiper(s), the wiper blade is not roll-
ing over center. If this condition exists, refer to the
Wiper Arm Alignment paragraph of this group.
ADJUSTMENTS
WIPER ARM ALIGNMENT
(1)Verify wiper blade element condition and wiper
arm spring tension. Run wipers in low speed mode
while applying water to the windshield. Observe the
wiper blade that is chattering or skipping across the
windshield. If the wiper element is not rolling over
when the wiper direction reverses, align the wiper arm.
The extension bar portion of the wiper arm must be
twisted in the proper direction to allow the wiper ele-
ment to roll over when the direction reverses.
(2) Place two small adjustable wrenches placed 50
mm (2 in.) apart on the wiper arm extension rod.
(3) Twist the extension rod slightly in the opposite
direction that the element is laying on the wind-
shield while holding the wrench closest to the pivot
stationary.
(4) Repeat step Step 1, and align as necessary
until wiper stops chattering and wipes the wind-
shield clear.
Fig. 14 Wiper Unit
Fig. 15 Wiper Linkage
Fig. 16 Wiper Motor Connector
8K - 8 WINDSHIELD WIPERS AND WASHERSNS
REMOVAL AND INSTALLATION (Continued)

LAMPS
CONTENTS
page page
BULB APPLICATION...................... 25
EXTERIOR LAMP BULB SERVICE............ 9
EXTERIOR LAMP SERVICE................. 14HEADLAMP ALIGNMENT................... 5
INTERIOR LAMPS........................ 18
LAMP DIAGNOSIS........................ 1
LAMP DIAGNOSIS
INDEX
page page
GENERAL INFORMATION
ELECTRONIC DAYTIME RUNNING LIGHT (DRL).1
GENERAL INFORMATION.................. 1SAFETY PRECAUTIONS................... 1
DIAGNOSIS AND TESTING
DIAGNOSTIC PROCEDURES................ 2
GENERAL INFORMATION
GENERAL INFORMATION
NS 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 andtest 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.
ELECTRONIC DAYTIME RUNNING LIGHT (DRL)
The Combination Flasher/DRL is a module provid-
ing turn signal, hazard warning, and daytime run-
NSLAMPS 8L - 1

ning light functions (for Canadian vehicles), and has
been designed with internal relays to take advantage
of low current switching requirements in the vehicle.
It is plugged into the junction block at positions
three and four (Fig. 1), where all wiring associated
with its operation is terminated. The junction block
is adjacent to and left of the steering column of the
vehicle. For diagnostic information refer to Group 8J,
Turn Signal and Flashers.
On vehicles built for use in the United States, only
position four is used. Vehicles built for use in Canada
utilize both positions three and four.
To gain access to the device, remove the lower
steering column cover and knee blocker. Refer to
Group 8E, Instrument Panel and Gauges.SYSTEM FUNCTION
The combination-flasher/DRL may be operated in
its hazard warning mode either with or without the
ignition circuit being active. However, in order to
operate in the turn signal mode or the DRL mode,
the ignition circuit must be completed to the module.
While the combination-flasher portion is idle, there
is no current drawn through the module. The device
does not become active in the turn signal or hazard
warning modes until a signal ground circuit is sup-
plied to either of the turn signal inputs or the hazard
warning input. With the ignition OFF, there is no
current drawn through the module.
While the ignition is ON, the front turn signal fil-
aments are illuminated steadily thus providing the
DRL function. The DRL function may be inhibited by
applying a signal ground input from either the park
brake circuit or the headlamp relay activation circuit.
DIAGNOSIS AND TESTING
DIAGNOSTIC PROCEDURES
When a vehicle experiences problems with the
headlamp system, verify the condition of the battery
connections, charging system, headlamp bulbs, wire
connectors, relay, high beam dimmer switch and
headlamp switch. Refer to Group 8W, Wiring Dia-
grams, for component locations and circuit informa-
tion.
Fig. 1 Junction Block Terminal PINS
8L - 2 LAMPSNS
GENERAL INFORMATION (Continued)

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 generator drive belt. 2. Adjust or replace generator 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.
7. Low beam headlamp / foglamp fuse
blown.7. Locate cause of blown fuse and repair.
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.
4. Low beam headlamp / fog lamp
fuse blown.4. Locate cause of blown fuse and repair.
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.
NSLAMPS 8L - 3
DIAGNOSIS AND TESTING (Continued)

FOG LAMP DIAGNOSIS
CONDITION POSSIBLE CAUSES CORRECTION
FOG LAMPS ARE DIM WITH
ENGINE IDLING OR IGNITION
TURNED OFF.1. Loose or corroded battery
cables.1. Clean and secure battery cable
clamps and posts.
2. Loose or worn generator drive
belt.2. Adjust or replace generator 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.
FOG LAMP 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.
FOG LAMPS 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 fog lamp
circuit.3. Test amperage draw of fog lamp
circuit.
FOG LAMPS FLASH RANDOMLY 1. Poor lighting circuit Z1-ground. 1. Test for voltage drop across
Z1-ground locations. Refer to Group
8W.
2. High resistance in fog lamp
circuit.2. Test amperage draw of fog lamp
circuit.
3. Faulty fog lamp switch. 3. Replace fog lamp switch.
4. Loose or corroded terminals or
splices in circuit.4. Inspect and repair all connectors
and splices. Refer to Group 8W.
FOG LAMPS DO NOT ILLUMINATE 1. Blown fuse for fog lamp. 1. Replace fuse. Refer to Group
8W.
2. No Z1-ground at fog lamps. 2. Repair circuit ground. Refer to
Group 8W.
3. Faulty fog lamp switch. 3. Replace fog lamp switch.
4. Broken connector terminal or
wire splice in fog lamp circuit.4. Repair connector terminal or wire
splice.
5. Defective or burned out bulb. 5. Replace bulb.
8L - 4 LAMPSNS
DIAGNOSIS AND TESTING (Continued)

INTERIOR LAMPS
INDEX
page page
REMOVAL AND INSTALLATION
CONVENIENCE BIN LAMP................. 20
DOME LAMP BULB...................... 21
DOME LAMP........................... 21
FRONT DOOR COURTESY LAMP BULB...... 22
FRONT DOOR COURTESY LAMP........... 21
GLOVE BOX LAMP AND SWITCH........... 19
GLOVE BOX LAMP BULB.................. 19
HEADER READING/COURTESY LAMP BULB . . . 19HEADER READING/COURTESY LAMP....... 18
IGNITION HALO LAMP BULB............... 19
INSTRUMENT PANEL LAMPS AND SWITCHES . 20
LIFTGATE COURTESY LAMP BULB.......... 24
LIFTGATE COURTESY LAMP............... 23
OVERHEAD CONSOLE READING/COURTESY
LAMP BULB.......................... 18
RAIL LAMP MODULE BULB................ 23
REMOVAL AND INSTALLATION
OVERHEAD CONSOLE READING/COURTESY LAMP
BULB
REMOVAL
(1) Using a trim stick, lightly pry outward the for-
ward end of reading lamp lens.
(2) Rotate reading lamp bulb socket one quarter
turn counterclockwise.
(3) Pull socket out of lamp (Fig. 1).
(4) Pull bulb from socket.
INSTALLATION
(1) Push bulb into socket.
(2) Push socket into lamp.
(3) Rotate reading lamp bulb socket one quarter
turn clockwise.
(4) Insert tab on lamp lens between lamp switch
and overhead console.(5) Snap lens onto lamp lens pivots.
HEADER READING/COURTESY LAMP
REMOVAL
(1) Grasp outer edges of header reading/courtesy
lamp at headlining.
(2) Pull downward to disengage clips on reading/
courtesy lamp from roof header panel (Fig. 2).
(3) Disconnect wire connector from reading/cour-
tesy lamp.
(4) Remove lamp from vehicle.
INSTALLATION
(1) Position lamp on vehicle.
(2) Connect wire connector to reading/courtesy
lamp.
(3) Align clips on reading/courtesy lamp to mating
holes in roof header panel.
(4) Push upward to engage clips on reading/cour-
tesy lamp to roof header panel.
Fig. 1 Reading/Courtesy LampFig. 2 Header Reading/Courtesy Lamp
8L - 18 LAMPSNS