Pinpoint Test T: An Individual Fog Lamp Is Inoperative

Fog Lamps

Pinpoint Test T: An Individual Fog Lamp Is Inoperative

Refer to Wiring Diagram Set 86 (Fusion/Milan/MKZ, Fusion Hybrid, Milan Hybrid, MKZ Hybrid), 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. A separate ground circuit is supplied to each fog lamp.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors


PINPOINT TEST T: 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.

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T1 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.
- For Fusion or Milan, measure the voltage between the LH fog lamp C152-A, circuit CLF12 (BN/YE), harness side and ground; or between the RH fog lamp C162-A, circuit CLF12 (BN/YE), harness side and ground.




- For MKZ, measure the voltage between the LH fog lamp C152-1, circuit CLF12 (BN/YE), harness side and ground; or between the RH fog lamp C162-1, circuit CLF12 (BN/YE), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
REPAIR circuit GD121 (BK/YE) (LH fog lamp) or circuit GD123 (BK/GY) (RH fog lamp) for an open. TEST the system for normal operation.

No
REPAIR circuit CLF12 (BN/YE) for an open. TEST the system for normal operation.

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