ISUZU TROOPER 1998 Service Repair Manual

8D – 348 WIRING SYSTEM
1 Rear Defogger Does Not Operate
•IS THE REAR DEFOGGER SWITCH NORMAL?
YES
YES
REPLACE THE FUSE
NO
NO
•ARE THE FUSES C-4 (10A) AND C-17
(25A) NORMAL?
•IS THE REAR DEFOGGER RELAY NORMAL?
REPLACE THE RELAY
YESNO
TURN ON THE STARTER SWITCH AND THE REAR DEFOGGER
SWITCH
YESNO
•
GROUND IT SECURELY
YESNO
•IS R-3 GROUNDED SECURELY? REPAIR OR REPLACE THE SWITCH
IS THERE A BATTERY VOLTAGE APPLIED BETWEEN THE REAR
DEFOGGER CONNECTOR 1 G-3 AND THE GROUND? •
YES
REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT IN
EACH OF THE FOLLOWING
CONNECTIONS: FUSE C-17 (25A) AND
2 B-38 , FUSE C-4 (10A) AND 3 B-38 ,
4 B-38 AND 1 G-3 , 4 I-17
AND 8 B-6 , 5 I-17 AND FUSE C-4 (10A)
NO
•IS THERE CONTINUITY BETWEEN 1 G-7
AND THE GROUND?
REPLACE THE ALARM & RELAY CONTROL
UNITREPAIR A POOR CONNECTION AT THE
CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 1 G-7
AND R-3

WIRING SYSTEM 8D – 349
2 Rear Defogger Timer Does Not Function
REPLACE THE ALARM & RELAY CONTROL UNIT

8D – 350 WIRING SYSTEM
Audio
General Description
The audio circuit is designed for the current to flow
through the receiver circuit when the radio switch is
turned on with the starter switch in“ACC” or “ON”.
Current runs through the memory circuit of the audio
regardless of the position of the starter switch.
The radio antenna operates in connection to the radio
switch. The antenna rod goes up when the switch is
ON and goes down to be stored in the fender with the
switch OFF. The antenna rod also goes down when
the starter switch is turned off with radio on.

WIRING SYSTEM 8D – 351
Circuit Diagram (RHD)-1
D08RW765
1
R-5 2
11
I-15
3
0.3
R/GI-15
1
0.5
Y
0.5
Y
0.5
Y
RR SPEAKER
-LHFRT SPEAKER
-LHFRT SPEAKER
-RHRR SPEAKER
-RH
TWEETER-LH TWEETER-RHI-15 0.85
G/R
TAIL RELAY
(4)
ILLUMINATION
CONTROLLER(3)4
I-15H-27
0.5
O/G0.5
O/G3.0
L/B
C-11 10A
AUDIO(ACC)
MIRROR
4 STARTER SW
(ACC)
R-520H-328H-278
0.5
L
0.5
L
0.5
L
I-15
19H-327H-27
1
R-10 2
2
0.5
O
0.5
O
0.5
O
I-15R-1018H-3214H-279
0.5
B
0.5
B
0.5
B
I-15
17H-3213H-27
1
D-10 2
6
0.5
W
0.5
W
I-15D-103 12H-2715
0.5
R
0.5
R
I-15
H-18
H-1811 11H-27
2
D-13 1
D-13
1
D-1 2
7
0.5
GR
0.5
GR
I-15D-13 18H-2716
0.5
G
0.5
G
I-15
H-22
H-2211 17H-27
2
D-4 1
+
–+
–D-4
AUDIO
H-1614
14
I-15H-25
1.25
R/W 1.25
R/W5.0
W
C-15 20A
AUDIO(B)
19 BATT.(+)+
–
+
– +
– +
–

8D – 352 WIRING SYSTEM
Circuit Diagram (RHD)-2
D08RW681
I-15
AUDIO
0.85
B/L10
I-15
0.5
BR/R
0.5
BR/R0.5
R/W 12B-8
LIMIT
SW
(UP)LIMIT
SW
(DOWN)
DOWN UP
AUTO ANTENNA
H-25
1 6
I-39
BODY-FRT
M
5.0
W BATT.(+)
C-16 10A
CLOCK(B), ROOMB-82

WIRING SYSTEM 8D – 353
Circuit Diagram (South Africa)-1
D08RWB90
1
R-5 2
11
I-15
3
0.3
R/GI-15
1
0.5
Y
0.5
Y
0.5
Y
RR SPEAKER
-LHFRT SPEAKER
-LHFRT SPEAKER
-RHRR SPEAKER
-RH
BODY-FRT
TWEETER-LH TWEETER-RH
I-15 0.85
G/R
TAIL RELAY
(4)
ILLUMINATION
CONTROLLER(3)4
I-15H-27
0.5
O/G0.5
O/G3.0
L/B
C-11 10A
AUDIO(ACC)
MIRROR
4 STARTER SW
(ACC)
R-520H-328H-278
0.5
L
0.5
L
0.5
L
I-15
19H-327H-27
1
R-10 2
2
0.5
O
0.5
O
0.5
O
I-15+–R-1018H-3214H-279
0.5
B
0.5
B0.85
B/L
0.5
B
I-15
10
I-15
I-39 17
H-3213H-27
1
D-10 2
6
0.5
W
0.5
W
I-15D-103 12H-2715
0.5
R
0.5
R
I-15
H-18
H-1811 11H-27
2
D-13 1
D-13
1
D-1 2
7
0.5
GR
0.5
GR
I-15D-13 18H-2716
0.5
G
0.5
G
I-15
H-22
H-2211 17H-27
2
D-4 1
D-4
AUDIO
H-1614
14
I-15H-25
1.25
R/W 1.25
R/W5.0
W
C-15 20A
AUDIO(B)
19 BATT.(+)
A
+– +–
+– +– +–

8D – 354 WIRING SYSTEM
Circuit Diagram (South Africa)-2
D08RWB89
0.5
BR/R 0.3
R/G 0.85
G/R TAIL RELAY
(4)
ILLUMINATION
CONTROLLER
(3)
AUTO
ANTENNA
SW
0.5
O/G
0.5
R/W
B-8
LIMIT
SW
(UP)LIMIT
SW
(DOWN)
DOWN UP
AUTO ANTENNA
B-59
1 2
M
5.0
W BATT.(+)
C-16 10A
CLOCK(B), ROOMB-82
B-594
B-59
6B-593
A

WIRING SYSTEM 8D – 355
Parts Location (RHD)
Legend
(1) R-10
(2) R-5
(3) D-13
(4) Auto Antenna
(5) H-32
(6) H-18
(7) D-10
(8) B-8
(9) I-39(10) D-1
(11) H-22
(12) Relay and Fuse Box
(13) B-19
(14) Fuse Box
(15) H-25, H-26, H-27
(16) D-4
(17) I-15
(18) B-59
D08RWB91
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1718

8D – 356 WIRING SYSTEM
D08RW764
Circuit Diagram (LHD)-1
1
R-5 2
11
I-15
3
0.3
R/GI-15
1
0.5
Y
0.5
Y
0.5
Y
RR SPEAKER
-LHFRT SPEAKER
-LHFRT SPEAKER
-RHRR SPEAKER
-RH
TWEETER-LH TWEETER-RHI-15 0.85
G/R
TAIL RELAY
(4)
ILLUMINATION
CONTROLLER(3)4
I-15H-26
0.5
O/G0.5
O/G3.0
L/B
C-11 10A
AUDIO(ACC)
MIRROR
8 STARTER SW
(ACC)
R-520H-326H-268
0.5
L
0.5
L
0.5
L
I-15
19H-327H-26
1
R-10 2
2
0.5
O
0.5
O
0.5
O
I-15+–R-1018H-3218H-269
0.5
B
0.5
B
0.5
B
I-15
17H-3219H-26
1
D-1 2
6
0.5
W
0.5
W
I-15D-13 3H-2615
0.5
R
0.5
R
I-15
H-22
H-22118H-25
2
D-4 1
D-4
1
D-10 2
7
0.5
GR
0.5
GR
I-15D-103 9H-4816
0.5
G
0.5
G
I-15
H-18
H-18118H-48
2
D-13 1
D-13
AUDIO
H-166
14
I-15H-25
1.25
R/W 1.25
R/W5.0
W
C-15 20A
AUDIO(B)
7 BATT.(+)
+– +–
+– +–
+–

WIRING SYSTEM 8D – 357
D08RW682
I-15
AUDIO
0.85
B/L10
I-15
0.5
BR/R
0.5
BR/R0.5
R/W 12B-8
LIMIT
SW
(UP)LIMIT
SW
(DOWN)
DOWN UP
AUTO ANTENNA
H-48
1 7
I-39
BODY-FRT
M
5.0
W BATT.(+)
C-16 10A
CLOCK(B), ROOMB-82
Circuit Diagram (LHD)-2