1998 ISUZU TROOPER tailgate

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.

LIGHTING SYSTEM8A–23
Tailgate Switch
Removal
1. Disconnect the battery ground cable.
2. Remove the screw and disconnect the connector(1)
to remove the tailgate switch(2).
683RS014
Installation
To install, follow the removal steps in the reverse order.
Door Switch
Removal
1. Disconnect the battery ground cable.
2. Remove the screw and disconnect the connector to
remove the door switch(1).
825RS043
Installation
To install, follow the removal steps in the reverse order.

8B–8WIPER/WASHER SYSTEM
Rear Wiper Motor
Removal
1. Disconnect the battery ground cable.
2. Remove the tailgate trim pad.
3. Remove the wiper arm/blade.
Refer to the removal steps of the Rear Wiper
Arm/Blade in this section.
4. Disconnect the connector remove the wiper shaft nut,
remove the fixing screws and then remove the rear
wiper motor(1).
885RS013
Installation
To install, follow the removal steps in the reverse order,
noting the following points.
1. Before installing the wiper arm/blade to the motor
shaft, confirm that the motor stops at the auto-stop
position.
2. Install the wiper arm so that the blade gets parallel to
the lowermost heat wire(2) of the rear defogger
(w/rear defogger), or position the blade 20 mm
(0.79 in) from edge of tailgate glass (W/O rear
defogger).
885RS012
885RS011
3. Tighten the motor shaft nut to the specified torque.
Torque: 6 N·m (0.6 kg·m/52 lb in)
4. Tighten the wiper arm nut to the specified torque.
Torque: 9 N·m (0.9 kg·m/78 lb in)

WIPER/WASHER SYSTEM8B–9
Alarm & Relay Control Unit
Removal
1. Disconnect the battery ground cable.
2. Remove the glove box.
3. Remove the instrument panel passenger lower cover
assembly.
4. Remove the passenger Knee bolster reinforcement
assembly.
5. Remove the fixing bolts, disconnect the connectors
and then remove the alarm & relay control unit (1).
826RW020
Installation
To install, follow the removal steps in the reverse order.
Rear Washer Motor
Removal
1. Disconnect the battery ground cable.
2. Remove the tailgate trim pad(2).
3. Remove two screws, disconnect the connector,
remove the washer hose and then remove the rear
washer tank(3).
4. Pull out the rear washer motor(1) from the washer
tank.
885RS009
Installation
To install, follow the removal steps in the reverse order.

8DÐ4 WIRING SYSTEM
The chassis electrical system is a 12Ðvolt system with a
negative ground polarity.
Wire size are appropriate to respective circuits, and
classified by color. (The classification of harnesses by
color is shown on the circuit diagram for ease of harness
identification.)
The wire size is determined by load capacity and the
length of wire required.
The vehicle harnesses are: body harness, chassis
harness, engine room harness, instrument harness,
transmission harness, engine ECGI harness, dome light
harness, door harness, rear body harness, tailgate
harness, SRS harness and battery cables.
The harnesses are protected either by tape or corrugated
tube, depending on harness location.
The circuit for each system consists of the power source,
wire, fuse, relay, switch, load parts and ground, all of
which are shown on the circuit diagram.
In this section, each electrical device is classified by
system.
For major parts shown on the circuit based on the circuit
diagram for each system, a summary, diagnosis of
troubles and inspection procedures are detailed.
Notes for Working on Electrical
Items
Disconnecting the Battery Cable
1. All switches should be in the ÒOFFÓ position.
2. Disconnect the battery ground cable (2).
3. Disconnect the battery positive cable (1).
CAUTION: It is important that the battery ground
cable be disconnected first. Disconnecting the
battery positive cable first can result in a short circuit.
Connecting the Battery Cable
Follow the disconnecting procedure in the reverse order.CAUTION: Clean the battery terminal and apply a
light coat of grease to prevent terminal corrosion.
Disconnecting the Connector
Some connectors have a tang lock to hold the connectors
together during vehicle operation.
Some tang locks are released by pulling them towards
you (1).
Other tang locks are released by pressing them forward
(2).
Determine which type of tang lock is on the connector
being handled.
Firmly grasp both sides (male and female) of the
connector (3).
Release the tang lock and carefully pull the two halves of
the connector apart.
Never pull on the wires to separate the connectors (4).
2
1
General Description
1
2
3
4

8DÐ34 WIRING SYSTEM
Connector No. Cable harness Location Parts (Load)
C-39
Windshield washer motor1
C-39
Windshield wiper motor2
C-39
FRT fog light relay4
C-39Meter, Vehicle speed sensor (Meter),
Fuel tank unit 6
Engine room
harnessFender-RH
E-28
ECM, O2 sensor
E-29ECM, Data link connector
Engine ECGI
harnessEngine-common
chamber
R-3
RR washer motor, Rear wiper motor, Luggage
room light, RR defogger, High mount stoplight,
Tailgate key SW, RR door lock actuator-LH,
Tailgate lock actuator-LH, RR power window
SW-LH
R-4Taillight, Stoplight, RR turn signal light, Backup
light, License plate light, Fuel tank unit, Fuel
pump, Trailer harness connector, RR fog light Rear body
harnessBody-RR
E-30
E-31ECM, Data link connector, A/T Shift indicator
control unit DIS
C-39Fuel pump relay, ECM main relay 5
C-39Windshield intermittent relay3
M-16
TCMMission
harnessEngine
C-39Side turn signal light (RH) 7
C-39Vehicle speed sensor, Brake fluid SW 8
I-39
AudioInstrument
harnessBody-FRT
C-85
EBCMEngine room
harnessBody-Center
U-2
SDMSRS
harnessBody-FRT

8DÐ36 WIRING SYSTEM
Connector No. Cable harness Location Parts (Load)
C-39
Windshield washer motor, Side turn signal
light (RH)1
C-39
Windshield wiper motor2
C-39
Headlight-LH, FRT fog light relay4
C-39Meter, Vehicle speed sensor (Meter),
Fuel tank unit 6
Engine room
harnessFender-RH
E-28
ECM, O2 sensor
E-29ECM, Data link connector
Engine ECGI
harnessEngine-common
chamber
R-3
RR washer motor, Rear wiper motor, Luggage
room light, RR defogger, Tailgate key SW,
Tailgate lock actuator-LH, RR Door lock
actuator-LH, High mount stoplight, RR power
window SW-LH
R-4Taillight, Stoplight, RR turn signal light, License
plate light, Fuel tank unit, Fuel pump, Backup
light Rear body
harnessBody-RR
E-30
E-31ECM, Data link connector, A/T Shift indicator
control unit DIS
C-39Condenser fan (Saudi Arabia)
5
C-39Windshield intermittent relay3
M-16
TCMMission
harnessEngine
C-39Pump & VSV, Headlight-RH, Fuel pump relay,
ECM main relay 7
C-39High-beam indicator light, Vehicle speed
sensor, Headlight wiper timer 8
I-39
AudioInstrument
harnessBody-FRT C-85
EBCMBody-Center

8DÐ38 WIRING SYSTEM
Connector No. Cable harness Location Parts (Load)
C-39
Windshield washer motor1
C-39
Windshield wiper motor2
C-39
FRT fog light relay4
C-39Vehicle speed sensor (Meter), Meter,
Fuel tank unit 6
Engine room
harnessFender-RH
R-3
RR washer motor, Rear wiper motor, Luggage
room light, RR defogger, High mount stoplight,
Tailgate key SW, RR door lock actuator-LH,
Tailgate lock actuator-LH, RR power window
SW-LH
R-4Taillight, Stoplight, RR turn signal light, Backup
light, License plate light, Fuel tank unit, RR fog
light, Trailer harness connector Rear body
harnessBody-RR
C-39Tacho sensor
5C-39
Windshield intermittent relay, Charge relay3
C-39Side turn signal light (RH) 7
C-39Vehicle speed sensor, Brake fluid SW
8
I-39
Audio Instrument
harnessBody-FRT C-85
EBCMBody-FRT