Pinpoint Test Ab: The Trailer Lamps Are Inoperative - Trailer Parking Lamps
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.
- AB1 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 AB2.
- No : REPAIR any vehicle exterior lighting concerns. TEST the system for normal operation.
- AB2 CHECK CIRCUIT 962 (BN/WH) FOR POWER
- Place the headlamp switch in the ON position.
- Measure the voltage between trailer tow C4098-2, circuit 962 (BN/WH) (4-pin connector) or the trailer tow C4099-6, circuit 962 (BN/WH) (7-pin connector), harness side and ground.
- Is the voltage greater than 10 volts?
- Yes : Vehicle is operating correctly. SEND the trailer to an authorized camper/trailer repair center.
- No : GO to AB3.
- AB3 CHECK CIRCUIT 962 (BN/WH) FOR AN OPEN
- Place the headlamp switch in the OFF position.
- Disconnect: Central Junction Box (CJB) C270j.
- Place the headlamp switch in the ON position.
- Measure the voltage between CJB C270j-15, circuit 962 (BN/WH), (component side) and ground.
- Is the voltage greater than 10 volts?
- Yes : REPAIR the circuit. TEST the system for normal operation.
- No : INSTALL a new CJB. TEST the system for normal operation.