I would make sure that the ground wire is properly secured on the vehicle trailer wiring harness.

No ground wire on trailer.

On the new 6 way plug that i have for trailer their no white ground wire so whats wire would be the ground the ground wire. The box could overheat and start a fire or someone could get a shock from touching it. Installing ground wire on trailer lights. But either way i can help if you have either a 6 or 7 way. Your trailer electronics should work a little better now as previous to this it was grounding through the ball mount. Most likely your trailer has a 7 way and the reason you referred to it as a 6 way is because you didn t count the center plug.

If the trailer lights work with a different vehicle then the issue is isolated to the vehicle and checking the fuses is a great start but typically if no lights are working on the trailer at all then it is usually a grounding issue. Refer to manufacturerinstallation instructions and spec. Since not all trailer connectors will use what. No trailer lights when connected to a 2010 dodge grand caravan. Replacement pigtail for optronics rectangular led trailer clearance side marker light mcl76rb. Having the ground wire connect to metal that is corroded or covered with excessive undercoating will prevent a proper metal to metal connection.

Sounds like your trailer wiring does not have a ground circuit for it s connector. Connecting the ground wire to a metal electrical box will energize the box in the event of a short circuit. The easy solution for that is to run a wire from the ground pin of the connector to the trailer s frame. Don t ground to the electrical box. Don t rely on metal sheathing or an exposed ground wire. Next move on the the connector on the trailer itself.

Follow the ground wire and locate the point where it attaches to the trailer frame which is usually on the trailer tongue.