Isuzu Trooper (1998-2002 year). Manual - part 910

8D–174

WIRING SYSTEM

1-5  Clearance Light On The Left (Or Right) Side Inoperative

•

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

YES

NO

REPLACE THE BULB

•

IS THERE ANY CONTINUITY BETWEEN THE HARNESS SIDE
CONNECTOR 1     H-41     AND 2    C-22    (OR 2    C-31    )?

YES

NO

REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN
OPEN CIRCUIT BETWEEN 1   C-22    (OR 1   C-31   ) AND 
1   C-16   

REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT IN 
THE CIRCUIT

1-6  License Plate Light Inoperative

(RHD-1)

•

DO THE BOTH TAILLIGHTS LIGHT UP WHEN THE LIGHTING 
SWITCH IS AT THE CLEARANCE LIGHT POSITION?

YES

NO

GROUND     R-4     SECURELY

•

IS THE LICENSE PLATE LIGHT BULB NORMAL?

YES

NO

REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN
OPEN CIRCUIT BETWEEN 2     G-8     AND     R-4

REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT IN 
THE CIRCUIT

YES

NO

REPLACE THE BULB

•

IS THERE ANY CONTINUITY BETWEEN THE HARNESS
SIDE CONNECTOR 1    G-8      AND 1    H-39    ?

WIRING SYSTEM

8D–175

(RHD-2)

YES

NO

REPAIR A POOR CONNECTION AT 
THE CONNECTORS OR AN OPEN
CIRCUIT BETWEEN FUSE F-12 (15A)
AND 8  B-12

REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 4  X-9  AND 4  H-15  ,
 OR 2  F-9  (2  F-10  ) AND  R-4

IS FUSE F-12 (15A) NORMAL?

•

IS THE TAIL RELAY NORMAL?

•

•

YES

NO

REPLACE THE FUSE

IS  R-4  GROUNDED SECURELY?

•

YES

NO

YES

NO

REPLACE THE RELAY

REMOVE THE CONNECTOR OF THE LIGHTING SWITCH

•

IS THERE ANY CONTINUITY BETWEEN 8  B-12  AND 
7  B-12   WHEN THE SWITCH IS TURNED TO THE CLEARANCE
LIGHT OR HEADLIGHT POSITION?

YES

NO

REPAIR OR REPLACE THE LIGHTING 
SWITCH

IS THE BATTERY VOLTAGE APPLIED BETWEEN
THE HARNESS SIDE CONNECTOR 8  B-12   AND 
THE GROUND?

GROUND IT SECURELY

8D–176

WIRING SYSTEM

1-7  License Plate Light On The Left (Or Right) Side Inoperative

(RHD-2)

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

•

•

YES

NO

REPLACE THE BULB

WITH THE LIGHTING SWITCH AT THE CLEARANCE
LIGHT POSITION, IS THE BATTERY VOLTAGE APPLIED
BETWEEN 1   F-9   (OR 1   F-10  ) AND THE GROUND?

YES

NO

REPAIR A POOR CONNECTION AT 
THE CONNECTORS OR AN OPEN
CIRCUIT BETWEEN 10  H-32  AND
1   F-9   (OR 9   H-32   AND 1   F-10  )

REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 2  F-9   (OR 2   F-10  )
AND   R-4

WIRING SYSTEM

8D–177

2-1  All Illumination Lights Inoperative

•

IS TAIL RELAY NORMAL?

YES

NO

REPLACE THE RELAY

•

IS THE CONTINUITY IN THE LIGHTING SWITCH NORMAL?

YES

NO

REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN
OPEN CIRCUIT BETWEEN 7      B-12    AND    B-19

REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT IN THE
CIRCUIT BETWEEN FUSE F-12 AND 8    B-12

YES

NO

REPAIR OR REPLACE THE SWITCH

•

IS   B-19    GROUNDED SECURELY?

YES

NO

GROUND IT SECURELY

•

IS THE BATTERY VOLTAGE APPLIED BETWEEN 8     B-12
AND GROUND WHEN LIGHTING SWITCH IS ON?

2-2  Both Taillights Inoperative

•

DOES THE LICENCE PLATE LIGHT LIGHT UP WHEN THE
LIGHTING SWITCH IS AT THE CLEARANCE LIGHT 
POSITION?

YES

REPAIR A POOR CONNECTION AT THE CONNECTORS OR
AN OPEN CIRCUIT BETWEEN 1    R-13      (1     R-12     )
AND     R-4   , OR 2   F-7   (2   F-8   ) AND   R-4

NO

GROUND     R-4     SECURELY