Isuzu N-Series. Service manual - part 1110

8-152 CAB AND CHASSIS ELECTRICAL

1. Headlight
1-1. Both Headlights Inoperative

1-2. Headlight on The Left (or Right) Side Inoperative

N8A0118E

N8A5137E

CAB AND CHASSIS ELECTRICAL 8-153

1-3. Headlight in Low-beam Inoperative

1-4. Headlight in High-beam Inoperative

N8A0120E

N8A5139E

8-154 CAB AND CHASSIS ELECTRICAL

1-5. Headlight on The Left (or Right) Side in Low (or High)-beam Inoperative

1-6. Headlight Beam Does Not Change

N8A5140E

N8A0123E

CAB AND CHASSIS ELECTRICAL 8-155

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