Trailer Lights Turn Off when Headlights are On and Brake Pedal is Pressed
Updated 07/23/2015 | Published 07/22/2015
Question:
Every thing works fine but when the head lights are on and you put the brAkes on they go out on the trailer
asked by: Dean
Expert Reply:
This sounds like a ground issue or a possible short. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light.
A short could come from a dirty or corroded trailer connector. Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces.
The light grounds should also be attached to clean and corrosion free bare metal surfaces. If there is anything between a light ground and the metal trailer frame or if the trailer has an aluminum frame, tilt bed, or folding tongue, any of these things can interrupt the ground. Running jumper wires from the light grounds to the main trailer connector ground can help.
