What Circuit Would Prevent Trailer Wiring Exterior Lighting From Functioning

Question:

Hello, My trailer exterior overhead lights stopped working. Every other light does work on the trailer. Would this be a fuse problem? Thanks!

asked by: Conor M

Helpful Expert Reply:

It's very possible that you have a blown fuse in your 2006 Ford F-350 that is causing your trailer exterior lights to stop working, but what's also very likely is that the 12 volt accessory circuit pins of your trailer wiring have corrosion which needs to be sanded off and the circuit will function again so I would check that first. The pin in the 1:00 position of your 7-way is the correct one for this circuit.

If that checks out check under the hood for 12 volt trailer power circuit fuses/relays and replace as needed. I attached a help article on trailer wiring troubleshooting for more info on this for you to check out as well.

expert reply by: Jameson C