Isuzu N-Series. Manual — part 1018
CAB AND CHASSIS ELECTRICAL 8-177
1. Both Clearance Lights Inoperative
Notice:
Figure in parenthesis “( )” indicates place of inspection for clearance light on the right side.
•
ARE BOTH TAILLIGHTS OPERATIVE?
•
IS B-7 SECURELY GROUNDED?
YES
NO
TURN TAILLIGHTS ON (REFER TO TAILLIGHT
DIAGNOSIS IN THIS SECTION)
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN CLEARANCE LIGHT
CONNECTOR TERMINALS 1 B-5 (1 B-74 ) AND B-7
YES
•
TURN THE LIGHTING SWITCH TO
OR
POSITION
•
IS THERE BATTERY VOLTAGE APPLIED TO
CLEARANCE LIGHT CONNECTOR 4 B-5 (4 B-74 ) AND
GROUND?
YES
NO
NO
GROUND IT SECURELY
REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT BETWEEN
FUSE F-7 (10A) AND 4 B-5 (4 B-74 )
N8A0160E
8-178 CAB AND CHASSIS ELECTRICAL
2. Clearance Light on the Left (or Right) Side Inoperative
Notice:
Figure in parenthesis “( )” indicates place of inspection for clearance light on the right side.
•
IS THE CLEARANCE LIGHT BULB ON THE LEFT (OR
RIGHT) SIDE NORMAL?
•
IS THERE ANY CONTINUITY BETWEEN THE
YES
NO
REPLACE THE BULB
•
REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT BETWEEN
1 B-5 (1 B-74 ) AND B-7
YES
NO
REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT IN THE
CIRCUIT
HARNESS SIDE CONNECTOR 5 X-15 (12V), 5 X-4 (24V
AND NKR77 FOR TAIWAN) AND 4 B-5 (OR 4 B-74 )?
N8A0161E
CAB AND CHASSIS ELECTRICAL 8-179
3. Both Taillights Inoperative
• IS FUSE F-7 (10A) NORMAL?
• IS J-9 SECURELY GROUNDED?
YES
REPLACE THE FUSE
• IS THE TAIL RELAY NORMAL?
YES
GROUND IT SECURELY
YES
REPLACE THE RELAY
• IS THE LIGHTING SWITCH NORMAL?
• IS THE BATTERY VOLTAGE APPLIED BETWEEN
LIGHTING SWITCH HARNESS SIDE CONNECTOR
8 B-70 AND THE GROUND?
YES
NO
REPAIR OR REPLACE THE LIGHTING
SWITCH
YES
NO
NO
NO
NO
• TURN THE LIGHTING SWITCH TO
OR
POSITION
• IS THERE BATTERY VOLTAGE APPLIED TO 4 H-16
AND GROUND?
REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT BETWEEN
FUSE F-7 (10A) AND 8 B-70
• REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN LIGHTING SWITCH
HARNESS SIDE CONNECTORS 7 H-16 AND J-9
YES
NO
REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT BETWEEN
TAILLIGHT RELAY CONNECTORS 5 X-15 (12V),
5 X-4 (24V AND NKR77 FOR TAIWAN) AND
4 H-16
N8A0162E
8-180 CAB AND CHASSIS ELECTRICAL
4. Taillight on the Left (or Right) Side Inoperative
Notice:
Figure in parenthesis “( )” indicates place of inspection for taillight on the right side.
5. License Plate Light Inoperative
• IS TAILLIGHT BULB ON THE LEFT (OR RIGHT) SIDE
NORMAL?
• REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN CONNECTOR
TERMINAL 4 H-16 AND TAILLIGHT CONNECTOR
1 R-1 ( 1 R-6 )
YES
NO
REPLACE THE BULB
N8A0163E
• ARE BOTH TAILLIGHTS OPERATIVE?
• IS THE LICENSE PLATE LIGHT BULB NORMAL?
YES
NO
TURN THE TAILLIGHTS ON (REFER TO
TAILLIGHT DIAGNOSIS IN THIS SECTION)
YES
NO
REPLACE THE BULB
IS THERE BATTERY VOLTAGE APPLIED BETWEEN
5 H-16 AND THE GROUND WHEN TURNING THE
LIGHTING SWITCH ON?
• REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 1 R-2 OR 1 R-14
AND 7 H-16
YES
NO
REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT IN THE
CIRCUIT
•
N8A0164E
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