turn signal bulb ISUZU TROOPER 1998 Service Repair Manual

00 – 10 SERVICE INFORMATION
Problem Possible Cause Correction
STEERING COLUMN (CONT.)
TURN SIGNAL SWITCH
This troubleshooting covers mechanical problems only. See Section 8 for turn signal switch electrical
diagnosis.
Turn Signal Will Not Stay
in Turn Position
Turn Signal Will Not
Cancel
Turn Signal Difficult to
Operate
Turn Signal Will Not
Indicate Lane Change
Hezard Switch Cannot Be
Turned Off
No Turn Signal Lights
Front or Rear Turn Signal
Lights Not Flashing1. Foreign material or loose parts
preventing movement of yoke.
2. Broken or missing detent or canceling
spring.
1. Loose switch mounting screws.
2. Switch or anchor bosses broken.
3. Broken, missing or out of position
detent, return or canceling spring.
4. Worn canceling cam.
1. Turn signal switch arm loose.
2. Yoke broken or distorted.
3. Loose or misplaced springs.
4. Foreign parts and/or material.
5. Loose turn signal switch mounting
screws.
1. Broken lane change pressure pad or
spring hanger.
2. Broken, missing or misplaced lane
change spring.
3. Base of wire damaged.
1. Foreign material between hazard
switch to turn signal switch body.
1. Electrical failure in chassis harness.
2. Inoperative turn signal flasher unit.
3. Loose chassis harness connector.
1. Burned-out damaged turn signal bulb.
2. High resistance connection to ground
at bulb socket.
3. Loose chassis harness connector.Repair or replace signal switch.
Replace signal switch.
Tighten mounting screws.
Replace turn signal switch.
Replace turn signal switch.
Replace turn signal switch.
Tighten arm screw.
Replace turn signal switch.
Replace turn signal switch.
Repair turn signal switch.
Tighten mounting screws.
Replace turn signal switch.
Replace turn signal switch.
Replace turn signal switch.
Repair or replace hazard
switch.
Refer to Section 8 “Electrical
Troubleshooting”.
Replace flasher unit.
Repair loose connector.
Replace bulb.
Repair bulb socket.
Repair loose connector.

DRIVE LINE CONTROL SYSTEM (TOD) 4B2±10
Simplified checking method of ABS IN and BRAKE ON signals:
In the event that any of the signal inputs listed below are
observed while the self-diagnostic code is being
displayed (the self-diagnostic connector is short-circuited
to GND), you can simply check the ABS IN and BRAKE
ON signals as shown in the figures below.
C07RW017
Check Lamp
Check Lamp Valve Check
When the starter switch is turned on in the normal state,
the control unit turns on the CHECK lamp to check the
bulb.
C07RW019

LIGHTING SYSTEM8A–1
BODY AND ACCESSORIES
CONTENTS
Lighting System 8A. . . . . . . . . . . . . . . . . . . . . . . . .
Wiper/Washer System 8B. . . . . . . . . . . . . . . . . . .
Entertainment 8C. . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring System 8D. . . . . . . . . . . . . . . . . . . . . . . . . .
Meter and Gauge 8E. . . . . . . . . . . . . . . . . . . . . . . Body Structure 8F. . . . . . . . . . . . . . . . . . . . . . . . . .
Seats 8G. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Security and Locks 8H. . . . . . . . . . . . . . . . . . . . . .
Sun Roof/Convertible Top 8I. . . . . . . . . . . . . . . .
Exterior/Interior Trim 8J. . . . . . . . . . . . . . . . . . . . .
LIGHTING SYSTEM
CONTENTS
Service Precaution 8A–2. . . . . . . . . . . . . . . . . . . . . .
Headlight Bulb 8A–3. . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8A–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlight 8A–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlight and Associated Parts 8A–4. . . . . . . . .
Removal 8A–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlight Adjustment 8A–4. . . . . . . . . . . . . . . . . .
Fog Light Bulb 8A–5. . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8A–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–5. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fog Light Assembly 8A–6. . . . . . . . . . . . . . . . . . . . .
Removal 8A–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–6. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fog Light Adjustment 8A–6. . . . . . . . . . . . . . . . . .
Clarence Light Bulb 8A–6. . . . . . . . . . . . . . . . . . . . . .
Removal 8A–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–6. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Fog Light Bulb (RHD) 8A–7. . . . . . . . . . . . . . .
Removal 8A–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–7. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Taillight Bulb (Body) 8A–7. . . . . . . . . . . . . . . . . . . . .
Removal 8A–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–7. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Taillight Bulb (Bumper) 8A–8. . . . . . . . . . . . . . . . . . .
Removal 8A–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–8. . . . . . . . . . . . . . . . . . . . . . . . . . . .
License Plate Light Bulb (Body) 8A–8. . . . . . . . . . .
Removal 8A–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–8. . . . . . . . . . . . . . . . . . . . . . . . . . . .
License Plate Light Bulb (Bumper) 8A–9. . . . . . . . .
Removal 8A–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–9. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stoplight Bulb 8A–9. . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal and Installation 8A–9. . . . . . . . . . . . . . . High Mount Stoplight 8A–10. . . . . . . . . . . . . . . . . . . .
Removal 8A–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–10. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Turn Signal Light Bulb 8A–10. . . . . . . . . . . . . .
Removal 8A–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–10. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Side Turn Signal Light Bulb 8A–11. . . . . . . . . . . . . . .
Removal 8A–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–11. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Turn Signal Light Bulb 8A–11. . . . . . . . . . . . . .
Removal 8A–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–11. . . . . . . . . . . . . . . . . . . . . . . . . . .
Backup Light Bulb 8A–12. . . . . . . . . . . . . . . . . . . . . . .
Removal 8A–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–12. . . . . . . . . . . . . . . . . . . . . . . . . . .
Dome Light Bulb 8A–12. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8A–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–12. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Luggage Room Light Bulb 8A–13. . . . . . . . . . . . . . . .
Removal 8A–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–13. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Courtesy Light Bulb 8A–13. . . . . . . . . . . . . . . . . . . . . .
Removal 8A–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–13. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Map Light Switch/Bulb 8A–14. . . . . . . . . . . . . . . . . . .
Removal 8A–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–14. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cigarette Lighter Illumination Bulb 8A–14. . . . . . . . .
Removal 8A–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–14. . . . . . . . . . . . . . . . . . . . . . . . . . .
Ashtray Illumination Bulb 8A–15. . . . . . . . . . . . . . . . .
Removal 8A–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–15. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glove Box Illumination Bulb 8A–15. . . . . . . . . . . . . . .
Removal 8A–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–15. . . . . . . . . . . . . . . . . . . . . . . . . . . .

8A–2LIGHTING SYSTEM
Vanity Mirror Illumination Bulb 8A–16 . . . . . . . . . . . . .
Removal 8A–16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–16 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starter Switch 8A–17 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8A–17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–17 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lighting Switch (Combination Switch) 8A–18 . . . . . .
Removal 8A–18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–18 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fog Light Switch 8A–19 . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8A–19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–19 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stoplight Switch (W/O Cruise Control) 8A–20 . . . . . .
Removal 8A–20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–20 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake Switch (W/Cruise Control) 8A–21 . . . . . . . . . .
Removal 8A–21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–21 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signal Switch (Combination Switch) 8A–21 . . .
Removal and Installation 8A–21 . . . . . . . . . . . . . . .
Hazard Warning Switch 8A–22 . . . . . . . . . . . . . . . . . .
Removal 8A–22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation 8A–22 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate Switch 8A–23 . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8A–23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–23 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door Switch 8A–23 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8A–23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–23 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Defogger Switch 8A–24 . . . . . . . . . . . . . . . . . . .
Removal 8A–24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–24 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seat Heater Switch 8A–25 . . . . . . . . . . . . . . . . . . . . . .
Removal 8A–25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–25 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Key Remind Switch (Starter Switch) 8A–25 . . . . . . .
Removal and Installation 8A–25 . . . . . . . . . . . . . . .
Illumination Controller 8A–26 . . . . . . . . . . . . . . . . . . . .
Removal 8A–26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–26 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power/Winter Switch 8A–27 . . . . . . . . . . . . . . . . . . . . .
Removal 8A–27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–27 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Data and Specifications 8A–28 . . . . . . . . . . . . .
Service Precaution
WARNING: I F S O E Q U IPPED WITH A
SUPPLEMENTAL RESTRAINT SYSTEM (SRS),
REFER TO THE SRS COMPONENT AND WIRING
LOCATION VIEW IN ORDER TO DETERMINE
WHETHER YOU ARE PERFORMING SERVICE ON OR
NEAR THE SRS COMPONENTS OR THE SRS
WIRING. WHEN YOU ARE PERFORMING SERVICE
ON OR NEAR THE SRS COMPONENTS OR THE SRS
WIRING, REFER TO THE SRS SERVICE
INFORMATION. FAILURE TO FOLLOW WARNINGS
COULD RESULT IN POSSIBLE AIR BAG
DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.
CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, or other
corrosion inhibitors) on threaded fasteners or
fastener joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener. When
you install fasteners, use the correct tightening
sequence and specifications. Following these
instructions can help you avoid damage to parts and
systems.

8A–10LIGHTING SYSTEM
High Mount Stoplight
Removal
1. Disconnect the battery ground cable.
2. Remove the clips(2).
3. Pull out the high mount stoplight(1).
4. Remove the connector.
5. Remove the high mount stoplight.
803RS003
Installation
1. Insert the clips(1)(3) into the high mount stoplight(2).
2. Reconnect the connector.
3. Install the high mount stoplight.
803RS004
Front Turn Signal Light Bulb
Removal
1. Disconnect the battery ground cable.
2. Remove the screw at the upper portion of the light
bracket, and remove the bracket from the fender.
3. Remove the front combination light(1).
4. Remove the turn signal light socket(3) by turning it
counterclockwise.
5. Remove the bulb(2) by turning it counterclockwise
while pushing it at the same time.
801RS002
Installation
To install, follow the removal steps in the reverse order.

LIGHTING SYSTEM8A–11
Side Turn Signal Light Bulb
Removal
1. Disconnect the battery ground cable.
2. Pull the light/bulb(1) toward you while pushing the
light housing in the rear direction of the vehicle to
release its lock.
3. Remove the bulb by turning it counterclockwise while
pushing it at the same time.
801RW013
Installation
To install, follow the removal steps in the reverse order.
Rear Turn Signal Light Bulb
Removal
1. Disconnect the battery ground cable.
2. Remove the three screws and release the lock at two
positions.
3. Remove the rear combination light(3).
4. Remove the turn signal light socket/bulb(1) by turning
it counterclockwise.
5. Remove the bulb(2) by turning it counterclockwise
while pushing it at the same time.
803RS002
Installation
To install, follow the removal steps in the reverse order.

8A–28LIGHTING SYSTEM
Main Data and Specifications
Light and Bulb Specifications
D08RW539
Legend
(1) Dome Light
(2) Luggage Room Light
(3) Courtesy Light
(4) Side Turn Signal Light
(5) Front Turn Signal Light
(6) Clearance Light
(7) Front Combination Light
(8) Headlight
(9) Fog Light(10) Meter
(11) Map Light
(12) High Mount Step Light
(13) License Plate Light
(14) Rear combination Light
(15) Taillight/Stoplight
(16) Rear Fog Light
(17) Backup Light
(18) Rear Turn Signal Light.

LIGHTING SYSTEM8A–29
Light NameRated PowerNumber of
BulbsLens ColorRemarks
Headlight60w/55w2WhiteHalogen
FrontTurn signal light21w2Whitecombination
lightClearance light5w2Amber
FRT fog light55w2WhiteHalogen
Taillight/Stoplight5w/21w2Red
RearBumperTurn signal light21w2Ambercombination
lightTaillight/Stoplight5w/21w2RedBodyTurn signal light21w2Amber
Backup light21w2White
RR fog light21w2Red
Side turn signal light5w2Amber
License plate lightBumper5w2White
Body5W1White
High mount stoplight——RedLED
Map light5w2White
Dome light10w1White
Luggage room light8w1White
Courtesy light3.8w2White
A/C SW60mA1
RR defogger SW0.84w1
Mirror defogger SW0.84w1
FRT fog light SW0.7w1
RR fog light SW0.7w1
Cruise (Set)1.4w1Meter
Cruise (Main)1.4w1Meter
Check trans3w1Meter
Anti-theft3w1Warning box
Turn signal1.4w2Meter
Golw1.4w1Meter
Water sedimenter1.4w1Meter
Indicator/High beam1.4w1MeterWarning
lightABS1.4w1Meter
Check engine1.4w1Meter
Low fuel1.4w1Meter
4WD1.4w1Meter
Oil Pressure1.4w1Meter
Brake system1.4w1Meter
Charge1.4w1Meter
Seat belt2w1Meter
A/T shift position0.91w7Meter
A/T oil temp3w1Meter

8DÐ202 WIRING SYSTEM
Diagnosis
Quick Chart for Check Points
Check pointFuse
C-3
(10A)F-3
(15A)Turn
signal
SWHazard
SWFlasher
unitTurn
signal
bulbCable
harness
1 Both turn signal lights and hazard
warning lights inoperativeTrouble mode
2 Turn signal light flashes too quickly
3 Hazard warning lights inoperative
4 Turn signal lights inoperative
5 Turn signal lights on the right (or left) side
inoperative
6 Hazard warning lights on the right (or left)
side inoperative
7 Turn signal lights and hazard warning
ligths on the right (or left) side inoperative

WIRING SYSTEM 8DÐ203
1 Both Turn Signal Lights and Hazard Warning Lights Inoperative
2 Turn Signal Light Flashes Too Quickly
REINSTALL OR REPLACE THE BULB, REPAIR AN OPEN
CIRCUIT IN THE CIRCUIT, OR CHECK THE GROUND
CONNECTION
·IS THE HAZARD WARNING SW NORMAL?
YESNO
REPAIR OR REPLACE THE SW·
·
·REMOVE THE FLASHER UNIT
TURN THE STARTER SW ON
IS THE BATTERY VOLTAGE APPLIED BETWEEN
1 B-53 AND THE GROUND?
YES NO
REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT
BETWEEN 7 I-11 AND 1 B-53·IS B-19 GROUNDED SECURELY?
YESNO
GROUND IT SECURELY·IS THERE ANY CONTINUITY BETWEEN THE HARNESS
SIDE CONNECTOR 3 B-53 AND THE GROUND?
YES NO
REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT
BETWEEN 3 B-53 AND B-19REPLACE THE FLASHER UNIT