Isuzu Trooper (1998-2002 year). Service manual — part 954

8D–350

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 (15A) AND C-17
(25A) NORMAL?

•

IS THE REAR DEFOGGER RELAY NORMAL?

REPLACE THE RELAY

YES

NO

TURN ON THE STARTER SWITCH AND THE REAR DEFOGGER
SWITCH

YES

NO

•

GROUND IT SECURELY

YES

NO

•

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
UNIT

REPAIR A POOR CONNECTION AT THE
CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 1 G-7
AND R-3

WIRING SYSTEM

8D–351

2

Rear Defogger Timer Does Not Function

REPLACE THE ALARM & RELAY CONTROL UNIT

8D–352

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–353

Circuit Diagram (RHD)-1

D08RW765

1

R-5

2

11

I-15

3

0.3

R/G

I-15

1

0.5

Y

0.5

Y

0.5

Y

RR SPEAKER

-LH

FRT SPEAKER

-LH

FRT SPEAKER

-RH

RR SPEAKER

-RH

TWEETER-LH

TWEETER-RH

I-15

0.85

G/R

TAIL RELAY

(4)

ILLUMINATION

CONTROLLER(3)

4

I-15

H-27

0.5

O/G

0.5

O/G

3.0

L/B

C-11 10A

AUDIO(ACC)

MIRROR

4

STARTER SW

(ACC)

＋

−

R-5

20

H-32

8

H-27

8

0.5

L

0.5

L

0.5

L

I-15

19

H-32

7

H-27

1

R-10

2

2

0.5

O

0.5

O

0.5

O

I-15

＋

−

R-10

18

H-32

14

H-27

9

0.5

B

0.5

B

0.5

B

I-15

17

H-32

13

H-27

1

D-10

2

6

0.5

W

0.5

W

I-15

＋

−

D-10

3

12

H-27

15

0.5

R

0.5

R

I-15

H-18

H-18

11

11

H-27

2

D-13

1

＋

−

D-13

1

D-1

2

7

0.5

GR

0.5

GR

I-15

＋

−

D-1

3

18

H-27

16

0.5

G

0.5

G

I-15

H-22

H-22

11

17

H-27

2

D-4

1

＋

−

D-4

AUDIO

H-16

14

14

I-15

H-25

1.25

R/W

1.25

R/W

5.0

W

C-15 20A

AUDIO(B)

19

BATT.(+)