tailgate ISUZU TROOPER 1998 Service User Guide

WIRING SYSTEM 8DÐ237
Dome Light, Luggage Room Light,
Courtesy Light and Map Light
General Description
This circuit consists of the starter switch, door
switch, dome light, luggage room light, courtesy
light, map light, and alarm & relay control unit.
The dome light lights up when any one of doors
except the tailgate is opened with the switch set at
the door mode.
The courtesy lights for the front doors are controlled
by front door switchÐLH.
The luggage room light illuminates by opening the
tailgate when the switch is set at the door mode.
The map light illuminates by turning the switch on.
All these lights light up by turning on respective
switches regardless of the position of the starter
switch key.
The buzzer in the alarm & relay control unit sounds
to remind the driver to turn off the lights when the
starter switch is turned off.

8DÐ244 WIRING SYSTEM
Power Door Lock
General Description
The circuit consists of door lock (& power window)
switch, door lock actuator for front and rear door,
tailgate lock actuator and door lock key switch.
Front door lock switchÐLH is always provided with
battery voltage. The key or the inside lock button on
the both driverÕs and front passengerÕs door can
activate the lock mechanism of all the door
(including tailgate).
When driverÕs door lock switch or front passengerÕs
door lock switch is turned on, current flows for
about one second to door lock actuator of each door
connected in parallel with front door lock (& power
window) switchÐLH to activate actuator to lock and
unlock doors.

8DÐ256 WIRING SYSTEM
Diagnosis
Quick Chart for Check Points
Trouble modeCheck point
All the doors do not lock
and unlock by door lock
SW-Driver's sideFuse
(C-18 20A)FRT Door
lock
(& power
window)
SW-
Driver's
side
Door lock
switch
FRT–
Driver's
sideDoor lock
switch
FRT–
Passen-
ger's sideDoor lock actuator
FRT–LH FRT–RH RR–LH RR–RH TailgateCable
harness
All the doors do not get
locked (or unlocked) by
door lock SW-Passenger's
side
FRT door–LH does not get
locked (or unlocked)
FRT door–RH does not get
locked (or unlocked)
RR door–LH does not get
locked (or unlocked)
RR door–RH does not get
locked (or unlocked)
Tailgate does not get
locked (or unlocked)
Door lock does not operate
when operated from the
door lock key SW-Driver's
side
Door lock does not operate
when operated from the
door lock key SW-
Passenger's side
1.
2.
3.
4.
5.
6.
7.
8.
9.
FRT Door
lock
(& power
window)
SW-
Passen-
ger's side

8DÐ258 WIRING SYSTEM
2. All The Doors Do Not Get Locked (Or Unlocked) By FRT Door Lock
SW-PassengerÕs Side
YES
·CHECK THE DOOR LOCKING CONDITION BY
DOOR LOCK SW-DRIVER'S SIDE
·IS THE CONTINUITY IN THE FRT DOOR LOCK SW-
PASSENGER'S SIDE NORMAL?
NO
REFER TO ITEM NO. 1 IN THIS DIAGNOSIS
YES
·IS B-1 GROUNDED SECURELY?
NO
REPAIR OR REPLACE THE DOOR LOCK SW-
PASSENGER'S SIDE
YES
REPAIR A POOR CONNECTION OF CONNECTORS OR
AN OPEN CIRCUIT BETWEEN 2 D-30 AND 4 D-14
OR 1 D-30 AND 3 D-14
NO
GROUND B-1 SECURELY
3. FRT DoorÐLH Does Not Get Locked (Or Unlocked)
4. FRT DoorÐRH Does Not Get Locked (Or Unlocked)
5. RR DoorÐLH Does Not Get Locked (Or Unlocked)
6. RR DoorÐRH Does Not Get Locked (Or Unlocked)
7. Tailgate Does Not Get Locked (Or Unlocked)
REPLACE THE DOOR LOCK ACTUATOR

WIRING SYSTEM 8DÐ399
Diagnosis
Diagnosis Procedure
1. Check to see if the battery voltage is normal.
2. Check to see if the fuse is normal.
3. Replace the antiÐtheft & keyless entry control unit with one reserved for test. If a trouble recurs even after replacing
the control unit, find out the cause of the trouble by referring to ÒSystem check procedureÓ and the following list.
ITEM MALFUNCTION POSSIBLE CAUSE DETECTING METHOD REMARKS
ANTIÐTHEFT
indicator light
does not flash
ANTIÐTHEFT
indicator light
does not turn off.
(Steadily on)
When door is
opened by pulling
up locking knob,
alarm does not
operate
Alarm does not
stop. Indicator light
does not change
to fully ON
condition, or does
not come on at
all.Burnt out indicator
light bulb possible.
Refer to ÒConnector
check tableÓ in this
system.
Refer to ÒConnector
check tableÓ in this
system.
Refer to ÒConnector
check tableÓ in this
system.
Refer to ÒConnector
check tableÓ in this
system.
Refer to ÒConnector
check tableÓ in this
system.
Refer to ÒConnector
check tableÓ in this
system. Defective contact of door switch,
or open circuit in door switch
wiring.
Short circuit in the detect switch.
Engine hood, doors and tailgate
are not fully closed and locked.
Defective door switch, or short
circuit in switch wiring.
Defective tamper switch, or short
circuit in wiring.
Defective lock switch, or short
circuit in wiring.
Defective engine hood switch, or
short circuit in wiring.
Defective tailgate switch, or short
circuit in wiring.
Defective control unit.
Poor contact of lock switch, or
open circuit in wiring.
Broken wire in wiring to headlight
and horn, or a blown fuse.
Defective contact of detect
switch, or damaged switch wiring.With door open, dome light and
courtesy light do not come on.
Check the control unit connector.
Check to see if doors are closed
and locked.
Dome light and courtesy light
remain lit on after closing doors.
Check the control unit connector.
Check the control unit connector.
Check the control unit connector.
Luggage room light remains lit
after closing tailgate.
Check alarm operation (See No.
46 of ÒSystem check procedureÓ),
possible cause is a poor contact
of lock switch of an open circuit in
wiring.
Check to see if headlights go out.
Check the control unit connector.
Check the control unit connector. A
C
D
E B

8DÐ400 WIRING SYSTEM
ITEM MALFUNCTION POSSIBLE CAUSE DETECTING METHOD REMARKS
Even when door
unlocked with
key, alarm
operates.
Alarm does not
operate even with
tailgate open.
Even when
tailgate is opened
with key, alarm
does not stop.
Even when
engine hood is
opened with
remote release,
alarm does not
operate
Even when
starter switch is
turned, alarm
does not stop
Indicator light
continues
flashingRefer to ÒConnector
check tableÓ in this
system.
Refer to ÒConnector
check tableÓ in this
system.
Refer to ÒConnector
check tableÓ in this
system. Defective contact of detect
switch, or damaged switch wiring.
Door detect switch is assembled
to wrong door.
Defective contact of tailgate
switch, or defective wiring.
Defective contact of tailgate
detect switch, or damage wiring.
Damaged engine hood switch or
wiring.
Defective contact of starter
switch.
Damaged door switch, or a short
circuit in wiring.
Damaged tamper switch, or a
short circuit in wiring.Check the control unit connector.
When key is turned to lock
position, alarm stops.
When luggage room light switch
is turned on with tailgate open,
luggage room light does not
come on.
Check the control unit connector.
With starter switch turned to
ÒACCÓ position, audio, cigarette
lighter and door mirrors (on
ÒACCÓ circuit) do not operate.
After closing door, dome light and
courtesy light remain on.
Check the control unit connector. F
G
H
I
J
K

WIRING SYSTEM 8DÐ401
System Check Procedure
STEP OPERATION ITEM TO BE CHECKEDITEM OF
REMARKS
MALFUNCTION
Be sure to lock door
with locking knob.
Activate alarm
device.
All doors are
unlocked.
With key set at unlock
position, check to see
if alarm stops.
All doors are
locked.
Activate alarm
device.
Activate alarm
device.
Only left rear door
is unlocked. Check to see if engine hood,
tailgate and doors are closed and
locked.
Check to see if indicator light
remains lit off.
Check to see if indicator light
flashes.
Check to see if dome light and
courtesy light illuminate.
Check to see if indicator light
changes from flashing to steadily
on.
Check to see if indicator light
turns off in about 10 seconds.
Check to see if alarm operates
(with headlight flashing, and horn
blaring intermittently.)
Check to see if alarm stops.
Check to see if indicator light
turns on.
Check to see if indicator light
goes off after about 10 seconds.
Check to see if alarm does not
operate.
Check to see if indicator light
turns on.
Check to see if indicator light
goes off after about 10 seconds.
Check to see if alarm starts. Turn starter key to ÒONÓ position.
Open windows fully.
Pull out starter key after turning it
back to ÒOFFÓ position.
Unlock left front door with locking
knob.
Open left front door. (And get out
of the vehicle.)
Close left front door.
Lock left front door.
Wait about 10 seconds
Unlock left front door with locking
knob.
Insert key into key cylinder of left
front door and turn it in unlock
direction.
Lock left front door.
Wait for about 10 seconds.
Unlock left front door with key.
Lock left front door with key.
Wait for about 10 seconds.
Unlock left rear door with locking
knob.K
A
B
C
D
E
B
C
F
B
C
D 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

8DÐ402 WIRING SYSTEM
STEP OPERATION ITEM TO BE CHECKEDITEM OF
REMARKS
MALFUNCTION
With key set at
unlock position,
check to see if
alarm stops.(All
doors are unlocked.)
All doors are
locked.
Activate alarm
device.
Only tailgate is
unlocked.
With key set at
unlock position,
check to see if
alarm stops.
Activate alarm
device.
Activate alarm
device. Check to see if alarm stops.
Check to see if indicator light
flashes.
Check to see if dome light and
courtesy light come on.
Check to see if indicator light is
steadily on.
Check to see if indicator light
turns off in about 10 seconds.
Check to see if alarm operates.
Check to see if alarm stops.
Check to see if indicator light
flashes.
Check to see if luggage room
light on.
Check to see if indicator light
changes over from flashing into
lighting condition.
Check to see if indicator light
goes off after about 10 seconds.
Check to see if alarm does not
operate.
Check to see if indicator light
come on.
Check to see if indicator light
goes off after about 10 seconds. Insert key into key cylinder of left
front door and turn it to unlock
direction.
Open left rear door.
With one person in vehicle, close
left rear door.
Lock left front door with locking
knob.
Wait about 10 seconds.
Unlock tailgate from inside with
locking knob.
Open tailgate, insert key into key
cylinder of tailgate and turn it in
lock direction.
Leave tailgate open.
Close tailgate
Insert key into tailgate key
cylinder and turn it in lock
direction.
Wait about 10 seconds.
Unlock tailgate with key.
Lock tailgate with key.
Wait about 10 seconds.E
A
B
C
D
H
A
G
B
C
F
B
C 17
18
19
20
21
22
23
24
25
26
27
28
29
30

WIRING SYSTEM 8DÐ405
TERMINAL
CONNECTIONCHECK
OPERATIONCIRCUIT
NO. ITEM CONDITION
1 FRT door switchÐLH, RH ContinuityOpen door Continuity
Close door No continuity
2 RR door switchÐLH, RH ContinuityOpen door Continuity
Close door No continuity
3Ñ Ñ Ð Ð
4 Door lock key switchÐLH, RH Continuity Lock with key Continuity
5 FRT door lock switchÐLH, RH Continuity Lock Continuity
6 Tailgate switch ContinuityOpen tailgate Continuity
Close tailgate No continuity
8 AntiÐtheft horn Voltage Ð Approx. 12V
10 Battery Voltage Ð Approx. 12V
11 Door switch ContinuityUnlock with locking knob Continuity
Lock with locking knob No continuity
12 Engine hood switch ContinuityOpen engine hood Continuity
Close engine hood No continuity
13 Detect switch ContinuityUnlock with key Continuity
Lock with key No continuity
14 Door lock key switch Continuity Unlock Continuity
15 FRT door lock switchÐLH, RH Continuity Unlock Continuity
16 Tamper switch Continuity Ð No continuity
17 Ground Continuity Ð Continuity
18 Starter switch Voltage Starter switch ÒACCÓ Approx. 12V
19 Indicator light Voltage Ð Approx. 12V
20 Dome light Voltage Dome light ÒDOORÓ position Approx. 12V
21 Anti-theft relay Voltage Ð Approx. 12V
22 Starter relay VoltageMode switch ÒPÓ or ÒNÓ Approx. 12V
Clutch pedal depressed Approx. 12V
Connector Check Table
Check the antiÐtheft & keyless entry control unit harness side connector BÐ20 by using a circuit tester.

8F±2BODY STRUCTURE
Installation 8F±62. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Window Regulator And Glass 8F±63. . . . . . . .
Parts Location 8F±63. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8F±63. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8F±64. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Door Fixed Glass And Glass Run 8F±65. . . . .
Parts Location 8F±65. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8F±65. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8F±66. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Door Sash Moulding 8F±67. . . . . . . . . . . . . . . .
Parts Location 8F±67. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8F±67. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8F±67. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Door Moulding 8F±68. . . . . . . . . . . . . . . . . . . . .
Parts Location 8F±68. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8F±68. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8F±68. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Door Waist Seal 8F±69. . . . . . . . . . . . . . . . . . .
Parts Location 8F±69. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8F±69. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8F±69. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Door Waist Seal 8F±70. . . . . . . . . . . . . . . . . . . .
Parts Location 8F±70. . . . . . . . . . . . . . . . . . . . . . . .
Removal and Installation 8F±70. . . . . . . . . . . . . . .
Front Door Weatherstrip 8F±71. . . . . . . . . . . . . . . . . .
Parts Location 8F±71. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8F±71. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8F±72. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Door Weatherstrip 8F±73. . . . . . . . . . . . . . . . . .
Parts Location 8F±73. . . . . . . . . . . . . . . . . . . . . . . .
Removal and Installation 8F±73. . . . . . . . . . . . . . .
Front Door Seal Finisher 8F±74. . . . . . . . . . . . . . . . .
Parts Location 8F±74. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8F±74. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8F±74. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Door Seal Finisher 8F±75. . . . . . . . . . . . . . . . . .
Parts Location 8F±75. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8F±75. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8F±75. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate Assembly (LH) 8F±76. . . . . . . . . . . . . . . . . .
Parts Location 8F±76. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8F±76. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8F±77. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate Assembly (RH) 8F±78. . . . . . . . . . . . . . . . . .
Parts Location 8F±78. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8F±78. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8F±79. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate Strikers 8F±80. . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment 8F±80. . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate Stopper Assembly 8F±80. . . . . . . . . . . . . . .
Parts Location 8F±80. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8F±80. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation 8F±80. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate Dove-Tail 8F±81. . . . . . . . . . . . . . . . . . . . . . .
Parts Location 8F±81. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8F±81. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8F±81. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate Dove-Tail Striker 8F±82. . . . . . . . . . . . . . . . .
Adjustment 8F±82. . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate Frame Cover (LH) 8F±83. . . . . . . . . . . . . . .
Parts Location 8F±83. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8F±83. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8F±83. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate Frame Cover (RH) 8F±84. . . . . . . . . . . . . . .
Removal 8F±84. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8F±84. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate Sash Trim Cover 8F±85. . . . . . . . . . . . . . . . .
Parts Location 8F±85. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8F±85. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8F±85. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate Outer Weatherstrip 8F±86. . . . . . . . . . . . . . .
Parts Location 8F±86. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8F±86. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8F±86. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate Center Weatherstrip 8F±87. . . . . . . . . . . . . .
Parts Location 8F±87. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8F±87. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8F±87. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate Main Weatherstrip 8F±88. . . . . . . . . . . . . . .
Parts Location 8F±88. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8F±88. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8F±88. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spare Tire Carrier 8F±89. . . . . . . . . . . . . . . . . . . . . . .
Parts Location 8F±89. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8F±89. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8F±89. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlining 8F±90. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Location 8F±90. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8F±90. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8F±91. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Air Deflector 8F±92. . . . . . . . . . . . . . . . . . . . . . .
Parts Location 8F±92. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8F±92. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8F±92. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Roof Moulding 8F±94. . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Location 8F±94. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8F±94. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8F±95. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windshield 8F±96. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Location 8F±96. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8F±96. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8F±97. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Quarter Side Glass 8F±101. . . . . . . . . . . . . . . . .
Parts Location 8F±101. . . . . . . . . . . . . . . . . . . . . . . .