ISUZU TROOPER 1998 Service Repair Manual

8D – 498 WIRING SYSTEM
Diagnosis
Quick Chart for Check Points
Trouble modeCheck point
Seat heater on both sides does not heat up
Seat heater on the driver (or passenger)
side does not heat up
Heat (or keep) position does not heat up
1.
2.
3.
Fuse C-2
(15A)Seat heater SW
Driver sidePassenger
sideHeat unit
Driver sidePassenger
side
Cable
harness
1. Seat Heater on Both Sides Does Not Heat Up
YES
REPLACE THE FUSE
NO
•IS FUSE C-2 (15A) NORMAL?
IS B-26 GROUNDED SECURELY?
YES
GROUND IT SECURELY
NO
•
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN C-2 (15A) AND 2 B-29
(2 B-31 )

WIRING SYSTEM 8D – 499
2. Seat Heater on The Driver (Or Passenger) Side Does Not Heat Up
YES
REPAIR A POOR CONNECTION AT
THE CONNECTORS OR AN OPEN
CIRCUIT IN THE CIRCUIT
NO
•
•
•DISCONNECT THE SEAT HEATER SWITCH CONNECTOR
TURN THE STARTER SWITCH “ON”
IS THE BATTERY VOLTAGE APPLIED BETWEEN THE SEAT
HEATER SW HARNESS SIDE CONNECTOR 2 B-29
(OR 2 B-31 ) AND THE GROUND?
•IS THE SEAT HEATER SW FUNCTION NORMAL?
YES
REPLACE THE SEAT HEATER SW
NO
•
•DISCONNECT THE HEAT UNIT CONNECTOR
IS THERE ANY CONTINUITY BETWEEN THE HEAT UNIT
CONNECTOR 1 T-8 , 3 T-8 AND 4 T-8 (OR 1 T-10 ,
3 T-10 AND 4 T-10 )
YES
REPLACE THE HEAT UNIT
NO
REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN OPEN
CIRCUIT BETWEEN 1 B-29 AND 1 T-8 , 4 B-29 AND 3 T-8 ,
4 T-8 AND GROUND (OR 1 B-31 AND 1 T-10 , 4 B-31 AND
3 T-10 , 4 T-10 AND GROUND)
3. Heat (Or Keep) Position Does Not Heat Up
YES
REPLACE THE SEAT HEATER SW
NO
•IS THE SEAT HEATER SW FUNCTION NORMAL?
REPLACE THE HEAT UNIT

8D – 500 WIRING SYSTEM
Power Seat
General Description
The circuit consists of power seat switch, front tilt
motor (driver’s seat only), rear tilt motor (driver’s seat
only), slide motor and recliner motor.
Power seat switch has a tilt and slide switch and a
recliner switch. The motor built in the seat can be
actuated by operating these switches to move the
seat to desired position, independent of position of
starter switch.

WIRING SYSTEM 8D – 501
Circuit Diagram (RHD)-1
D08RW640
A
H-57 C/B-2
3.0
B/L3.0
B/L
2.0
R1T- 2
POWER SEAT SW-RH
1
2.0
B2.0
B2.0
B
2.0
B
2.0
B2.0
B
M
T- 1
1
1.25
Y 1.25
Y/B
T- 1
T- 4
T- 46
1.25
Y/R1.25
Y/W
T- 1
3
T- 1UP DOWN
8T- 3
RECLINER
MOTOR & SW
-LH DRIVER'S SEAT
TILT MOTOR
& SW-FRT
3
B
M
T- 1
5
T- 1
10
1.25
L/WFRT RR
1.25
G/R
SLIDE MOTOR
-LH
T- 32
T- 31 2 1
M
T- 1
2
1.25
L 1.25
L/B
T- 1
T- 6
T- 67
1.25
L/R1.25
G
T- 1
4
T- 1UP DOWN
9T- 5
DRIVER'S SEAT
TILT MOTOR
& SW-RR
3
T- 52
T- 51 2 1
M
T-113 1.25
W 1.25
B/W
T-116 1.25
BR1.25
LG
T-112
T-115T-11
4
H-57
BODY-CTR BODY-LH BODY-RH4
T- 22
B-26
B-2
B-18
T- 71
T- 72FRT RR

8D – 502 WIRING SYSTEM
Circuit Diagram (RHD)-2
D08RW641
A
H-58 3.0
B/L
2.0
R1T- 9
POWER SEAT SW-LH
1M
T-131
T-132 1.25
G FRT RR FRT RR
T- 9 2.0
B
2.0
B
2.0
B2H-5841.25
G/R
M
T-123 1.25
W 1.25
B/W
T-126 1.25
BR1.25
LG
T-122
T-125T-12
SLIDE MOTOR
-RHRECLINER
MOTOR & SW
-RH
4
B

WIRING SYSTEM 8D – 503
Parts Location (RHD)
Legend
(1) T-6
(2) T-4
(3) T-1
(4) B-2
(5) Fuse Box
(6) H-58
(7) B-26(8) T-9
(9) T-13
(10) T-12
(11) H-57
(12) T-7
(13) Relay and Fuse Box
(14) B-18
D08RW996
1
3
4
5 6 8 7
11 12
9 13
10
14
2

8D – 504 WIRING SYSTEM
Circuit Diagram (LHD)-1
D08RW951
A
H-57 C/B-2
3.0
B/L3.0
B/L
2.0
R1T- 2
POWER SEAT SW-LH
1
2.0
B2.0
B2.0
B
2.0
B
M
T- 1
1
1.25
Y 1.25
Y/B
T- 1
T- 4
T- 46
1.25
Y/R1.25
Y/W
T- 1
3
T- 1UP DOWN
8T- 3
RECLINER
MOTOR & SW
-LH DRIVER'S SEAT
TILT MOTOR
& SW-FRT
3
B
M
T- 1
5
T- 1
10
1.25
L/WFRT RR
1.25
G/R
SLIDE MOTOR
-LH
T- 32
T- 31 2 1
M
T- 1
2
1.25
L 1.25
L/B
T- 1
T- 6
T- 67
1.25
L/R1.25
G
T- 1
4
T- 1UP DOWN
9T- 5
DRIVER'S SEAT
TILT MOTOR
& SW-RR
3
T- 52
T- 51 2 1
M
T- 113 1.25
W 1.25
B/W
T- 116 1.25
BR1.25
LG
T- 112
T- 115T- 11
4
H-57
BODY-LH4
T- 22
B-18
BODY-CTR
B-26
BODY-RH
B-2
T- 71
T- 72FRT RR

WIRING SYSTEM 8D – 505
Circuit Diagram (LHD)-2
D08RW952
A
H-58 3.0
B/L
2.0
R1T- 9
POWER SEAT SW-RH
1M
T-131
T-132 1.25
G FRT RR FRT RR
T- 9 2.0
B
2.0
B
2.0
B2H-5841.25
G/R
M
T-123 1.25
W 1.25
B/W
T-126 1.25
BR1.25
LG
T-122
T-125T-12
SLIDE MOTOR
-RHRECLINER
MOTOR & SW
-RH
4
B

8D – 506 WIRING SYSTEM
Parts Location (LHD)
Legend
(1) T-6
(2) T-4
(3) T-1
(4) B-18
(5) Fuse Box
(6) H-57
(7) T-7(8) B-26
(9) H-58
(10) T-9
(11) T-13
(12) Relay and Fuse Box
(13) B-2
(14) T-12
D08RW994
2 1
3
4
5 6 7 8
9 10 11 12
14
13

WIRING SYSTEM 8D – 507
Diagnosis
Quick Chart for Check Points
1.
2.
3.
4.
5.
1.
2.
3.
Cable
har-
nessCheck point
Trouble mode
Driver
seat
Passen-
ger
seat
Reclin-
ing
motor Reclin-
ing
SW Tilt & slide motor
Slide RR tilt FRT tilt
Tilt & slide SW
Slide RR tilt FRT tilt Circuit
breaker
(30A)
Power seat does
not operate at any
direction
Front tilt
mechanism does
not operate
Rear tilt mechanism
does not operate
Sliding mechanism
does not operate
Reclining
mechanism does
not operate
Power seat does
not operate at any
direction
Sliding mechanism
does not operate
Reclining
mechanism does
not operate