Pinpoint Test S: An Individual Fog Lamp Is Inoperative

Fog Lamps

Pinpoint Tests

Pinpoint Test S: An Individual Fog Lamp Is Inoperative

Refer to Wiring Diagram Set 86, Fog Lamps for schematic and connector information. Diagrams By Number

Normal Operation

When the fog lamp relay is energized, voltage is routed to the fog lamps. Each fog lamp has a dedicated ground circuit.

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Fog lamp relay
- Headlamp switch
- LCM



PINPOINT TEST S: AN INDIVIDUAL FOG LAMP IS INOPERATIVE

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

-------------------------------------------------
S1 CHECK FOR VOLTAGE TO THE FOG LAMP


- Ignition ON.
- Turn the headlamps on and engage the fog lamp switch.
- measure the voltage between the LH fog lamp C152-2, circuit 478 (TN/OG), harness side and ground; or between the RH fog lamp C162-2, circuit 478 (TN/OG), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
REPAIR circuit 57 (BK) for an open. TEST the system for normal operation.

No
REPAIR circuit 478 (TN/OG) for an open. TEST the system for normal operation.

-------------------------------------------------