Isuzu N-Series. Service manual - part 1150

8-312 CAB AND CHASSIS ELECTRICAL

5. Warning/indicator Light
5-1. When The Parking Brake Lever Is Pulled, The Indicator Light Does Not Light Up

5-2. Even When The Parking Brake Lever Is Released, The Indicator Light Does Not Go Off

N8A5377E

N8A5378E

CAB AND CHASSIS ELECTRICAL 8-313

5-3. While The Engine Is Operating, The Oil Pressure Warning Light Does Not Go Off

5-4. Even When The Fuel Tank Is Full with Fuel, The Fuel Warning Light Lights Up

• IS THE ENGINE OIL PRESSURE NORMAL?

• WITH THE OIL PRESSURE SWITCH CONNECTOR  J-8

DISCONNECTED, DOES THE WARNING LIGHT GO
OFF?

• WHILE THE ENGINE IS OPERATING, IS THERE

CONTINUITY BETWEEN THE OIL PRESSURE SWITCH
CONNECTOR  J-8  AND THE BODY GROUND?

YES

YES

NO

NO

NO

REFER TO THE "ENGINE" SECTION

REPAIR A SHORT CIRCUIT BETWEEN 1  J-8  AND 1 

B-52  (METER)

REPLACE THE OIL PRESSURE SWITCH

N8A0316E

• WHEN THE FUEL TANK UNIT CONNECTOR  J-28  IS

DISCONNECTED, DOES THE WARNING LIGHT GO
OFF?

• IS THE FUEL TANK UNIT NORMAL?

YES

NO

NO

REPAIR A SHORT CIRCUIT BETWEEN THE FUEL
TANK UNIT HARNESS SIDE CONNECTORS 2  J-28
AND 10  B-51  (METER)

REPLACE THE FUEL TANK UNIT

N8A0317E

8-314 CAB AND CHASSIS ELECTRICAL

5-5. Even When The Fuel Tank Is Empty, The Low Fuel Warning Light Does Not Light Up

• DOES THE WARNING LIGHT HAVE A BURNED OUT

BULB, OR IS THE SOCKET POORLY CONNECTED?

• IS THE FUEL TANK UNIT NORMAL?

YES

YES

NO

NO

REPLACE THE BULB, OR REPAIR A POOR
CONNECTION AT THE SOCKET

REPLACE THE FUEL TANK UNIT

REPAIR A POOR CONNECTION AT THE CONNECTOR
OR AN OPEN CIRCUIT BETWEEN THE HARNESS
SIDE CONNECTORS 2  J-28  AND 10  B-51  (METER)
OR 3  J-28  AND  J-9 

N8A0318E

CAB AND CHASSIS ELECTRICAL 8-315

5-6. Even When The Transfer Level Is Shifted to 4wd Position, The Indicator Light Does Not Light Up

N8A5382E