Pinpoint Test T: The Individual Fog Lamp Is Inoperative

WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

T1 CHECK FOG LAMP GROUND
- Disconnect: Inoperative Fog Lamp.
- Measure the resistance between fog lamp connector pin 1, circuit 57 (BK), harness side and ground.
  
  Fig 1: Checking Fog Lamp Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : REPAIR circuit 478 (TN/OG). TEST the system for normal operation.
- No : REPAIR circuit 57 (BK). TEST the system for normal operation.