Pinpoint Test Y: The Trailer Lamps Are 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.
- Y1 CHECK LIGHTING OPERATION
- Key in OFF position.
- Disconnect: Trailer Tow C4098 (4-pin).
- Disconnect: Trailer Tow C4099 (7-pin).
- Disconnect the trailer from the vehicle.
- Check the operation of the vehicle exterior lighting systems for any concerns.
- Does the exterior lighting system of the vehicle operate correctly?
- Yes : GO to Y2.
- No : REPAIR any vehicle exterior lighting concerns. TEST the system for normal operation.
- Y2 CHECK CIRCUIT 206 (WH) FOR AN OPEN
- Measure the resistance between trailer tow C4098-1, circuit 206 (WH) (4-pin connector), or the trailer tow C4099-2, circuit 206 (WH) (7-pin connector), harness side and ground.
- Is the resistance less than 5 ohms?
- Yes : Vehicle is operating correctly. SEND the trailer to an authorized camper/trailer repair center.
- No : REPAIR the circuit. TEST the system for normal operation.