Isuzu Trooper (1998-2002 year). Manual - part 924

8D–230

WIRING SYSTEM

1   Both Backup Lights Inoperative

•

IS FUSE C-3 (10A) NORMAL?

•

IS    R-4   GROUNDED SECURELY?

GROUND IT SECURELY

YES

REPLACE THE FUSE

NO

YES

NO

•
•

YES

NO

•

•

SET THE TRANSMISSION GEAR TO THE REVERSE POSITION
WITH THE MODE SW (OR BACKUP LIGHT SW) CONNECTOR 
DISCONNECTED, IS THERE CONTINUITY BETWEEN THE SW 
SIDE CONNECTORS 5   C-43   AND 2   C-43   (1   E-42    AND
1   E-43   OR 1   M-8   AND 1   M-9  ) ?

REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN THE FUSE C–3 (10A)
AND MODE SW (BACKUP LIGHT SW)

NO

REPAIR OR REPLACE THE MODE SW 
(BACKUP LIGHT SW)

REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 2   C-43   ( 1   E-43   OR 
1   M-9   ) AND 8   H-32

TURN THE STARTER SW ON
IS THE BATTERY VOLTAGE APPLIED BETWEEN THE MODE 
SW (OR BACKUP LIGHT SW) HARNESS SIDE CONNECTORS 
8  M-25  (1  E-42  , 1  M-8   OR 1  E-15  ) AND THE GROUND?

WIRING SYSTEM

8D–231

2   Backup Light On The Left (Or Right) Side Inoperative

3   Backup Light Remains ON

REPAIR OR REPLACE THE MODE SW (BACKUP LIGHT SW)

•

IS THE BACKUP LIGHT BULB ON THE LEFT (OR RIGHT) SIDE
NORMAL?

YES

•

WITH THE STARTER SW AND THE BACKUP LIGHT SW AT ON
POSITION, IS THE BATTERY VOLTAGE APPLIED BETWEEN
3   R-13    (OR 3   R-12   ) AND THE GROUND OR 2   R-13   
(OR 2   R-12   ) AND THE GROUND?

REPLACE THE BULB

NO

REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 8   H-32
AND 3   R-13  (OR 3   R-12  ) OR 8   H-32   AND 2   R-13
(OR 2   R-12   )

NO

YES

REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN
OPEN CIRCUIT BETWEEN BACKUP LIGHT HARNESS SIDE
CONNECTOR 1   R-13    (OR 1  R-12 ) AND   R-4

8D–232

WIRING SYSTEM

Horn

General Description

The circuit consists of horn (high note), horn (low
note), horn relay and horn switch.
When horn switch is pushed, (independent of
position of starter switch) horn relay is activated to
sound horns.

WIRING SYSTEM

8D–233

Circuit Diagram (RHD)

3

H-16

12

X-8

X-8

X-8

2

C-28

1

1

HORN RELA

Y

2.0

G/O

0.85

G/O

0.3

B/O

0.3

B/O

0.85

G/Y

0.85

G/Y

2.0

G/O

5.0

W

BA

TT

.(+)

F-3 15A

HORN, HAZARD

FL-1 80A

MAIN

HAZARD

W

ARNING SW

(2)

12

B-12

HORN SW

HORN 

(LOW NOTE)

HORN 

(HIGH NOTE)

H-15

16

C-27

1

D08RW660