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 through circuit CLF21 (GY/VT) to the fog lamps. Ground is provided through circuit GD122 (BK).

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors



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.

NOTE: Make sure the bulb is good before continuing diagnostics.

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S1 CHECK FOR VOLTAGE TO THE FOG LAMP


- Ignition OFF.
- Disconnect: Inoperative Fog Lamp.
- Ignition ON.
- Place the headlamp switch in the PARKING LAMPS ON position and engage the fog lamp switch.
- Measure the voltage between the LH fog lamp C152-2, circuit CLF21 (GY/VT), harness side and ground; or between the RH fog lamp C162-2, circuit CLF21 (GY/VT), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
REPAIR circuit GD122 (BK) for an open. TEST the system for normal operation.

No
REPAIR circuit CLF21 (GY/VT) for an open. TEST the system for normal operation.

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