Pinpoint Test R: An Individual Fog Lamp Is Inoperative

WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

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

NOTE: The battery ground cable must be disconnected for accurate test results when checking ground circuits for continuity to ground.

NOTE: Verify that the headlamps operate correctly before proceeding with this pinpoint test.

R1 CHECK THE GROUND CIRCUIT FOR CONTINUITY
- Key in OFF position.
- Disconnect: Inoperative Fog Lamp
- Measure the resistance between the LH fog lamp C152-B, circuit GD120 (BK/GN), harness side and ground; or between the RH fog lamp C162-B, circuit GD123 (BK/GY), harness side and ground.
- Is the resistance less than 5 ohms?
1. YES : REPAIR circuit CLF12 (BN/YE) for an open. TEST the system for normal operation.
2. NO : For the RH fog lamp, REPAIR circuit GD123 (BK/GY) for an open. TEST the system for normal operation.
  For the LH fog lamp, go to R2.
R2 CHECK CIRCUIT GD120 (BK/GN) FOR AN OPEN
- Disconnect: Joint Connector 7 C2200
- For Edge, measure the resistance between the LH fog lamp C152-B, circuit GD120 (BK/GN), harness side and the joint connector 7 C2200-K, circuit GD120 (BK/GN), harness side and ground.
- For MKX, measure the resistance between the LH fog lamp C152-B, circuit GD120 (BK/GN), harness side and the joint connector 7 C2200-E, circuit GD120 (BK/GN), harness side and ground.
- Is the resistance less than 5 ohms?
1. YES : INSTALL a new joint connector. TEST the system for normal operation.
2. NO : REPAIR the circuit. TEST the system for normal operation.