Isuzu N-Series. Manual — part 1010
CAB AND CHASSIS ELECTRICAL 8-145
1-5. Headlight on The Left (or Right) Side in Low (or High)-beam Inoperative
1-6. Headlight Beam Does Not Change
• IS THE BULB NORMAL?
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT
[LOW BEAM]
BETWEEN 1 B-4 (OR 1 B-73 ) AND 3 X-6
[HIGH BEAM]
BETWEEN 2 B-4 (OR 2 B-73 ) AND 1 X-6
YES
NO
REPLACE THE BULB
N8A0122E
N8A0123E
8-146 CAB AND CHASSIS ELECTRICAL
1-7. Headlight Remains On when the Lighting SW is Turned Off
1-8. Headlight Comes On with The Lighting SW at The Clearance Light Position
• IS THE LIGHTING RELAY NORMAL?
• DISCONNECT THE LIGHTING SW CONNECTOR
• IS THE CONTINUITY BETWEEN THE SWITCH
CONNECTOR TERMINALS 1 B-70 AND 4 B-70
NORMAL?
YES
NO
REPLACE THE LIGHTING RELAY
REPAIR A SHORT CIRCUIT BETWEEN 4 X-3 AND
1 B-70
YES
NO
REPAIR OR REPLACE THE LIGHTING SW
N8A0124E
• DISCONNECT THE LIGHTING SW CONNECTOR
• WITH THE LIGHTING SW AT THE CLEARANCE LIGHT
POSITION, IS THE CONTINUITY BETWEEN 1 B-70
AND 4 B-70 NORMAL?
(NO CONTINUITY NORMAL)
NO
REPAIR OR REPLACE THE LIGHTING SW
N8A0125E
CAB AND CHASSIS ELECTRICAL 8-147
2. Fog Light
2-1. Both Fog Lights Inoperative (While Lighting Switch is On)
• IS FUSE F-6 (10A) OR F-8 (10A) NORMAL?
• IS THE TAIL RELAY NORMAL?
YES
NO
REPLACE THE FUSE
• REMOVE THE FOG LIGHT SW
• WHEN THE SWITCH IS "ON", IS THERE CONTINUITY
BETWEEN THE SWITCH CONNECTOR TERMINALS
3 B-87 AND 6 B-87 ?
YES
NO
REPLACE THE RELAY
• IS THE BATTERY VOLTAGE APPLIED BETWEEN THE
HARNESS SIDE CONNECTOR 3 B-87 AND THE
GROUND, WHILE THE LIGHTING SW IS ON?
(LIGHTING OPERATION IS NORMAL)
YES
NO
REPAIR OR REPLACE THE SW
• REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 6 B-87 AND 1 B-3
YES
NO
REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT BETWEEN
8 B-70 AND 5 X-15
N8A0126E
8-148 CAB AND CHASSIS ELECTRICAL
2-2. Fog Light on The Left (or Right) Side Inoperative (While Lighting Switch is On)
Notice:
Figures in parenthesis “( )” indicate place of inspection for the fog light on the right.
2-3. Fog Light Remains On
• IS THE BULB NORMAL?
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 2 B-3 AND B-7
(2 B-72 AND B-7 )
YES
NO
REPLACE THE BULB
N8A0127E
• DO THE TAILLIGHTS GO OFF?
REPAIR OR REPLACE THE FOG LIGHT SWITCH
YES
NO
REPLACE THE TAIL RELAY
N8A0128E
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