Troubleshooting Trailer Taillights That Only Function on One Side of the Trailer

Updated 06/26/2014 | Published 06/25/2014

Question:

Why does nothing work on the drivers side tail-light, parking, brake, or directional? I have bought hitches from you in the past, but health reasons prevented me from doing so on this car.

asked by: Steve W

Expert Reply:

Since all of the wiring problems are on one side of the trailer that leads me to believe the problem is in the grounding of the light assembly on that side of the trailer. A lot of light assemblies ground through the mounting hardware. You will want to make sure the assembly is connected to a clean metal surface.

I attached a couple FAQ articles that should be helpful as well.

expert reply by: Jameson C