Pinpoint Test Y: The Trailer Lamps Are Inoperative
WARNING: This page is about a different car, the 2004 Mercury Mountaineer and 2004 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
- Y1 CHECK TRAILER TOW GROUND
- Disconnect: Trailer Tow C439 (4-Pin Connector).
- Disconnect: Trailer Tow C473 (7-Pin Connector).
- Measure the resistance between the trailer tow C439-1, circuit 206 (WH), harness side and ground (4-pin connector) or between the trailer tow C473-2, circuit 206 (WH), harness side and ground (7-pin connector).
- Is the resistance less than 5 ohms?
Yes
The vehicle is operating correctly. SEND the trailer to an authorized camper/trailer repair facility.
No
REPAIR the circuit. TEST the system for normal operation.