Troubleshooting Running Light Circuit Not Working On Right Side of Trailer

Published 01/09/2019

Question:

My break lights an blinger work on both sides of my trailer but when i turn my running lights on only the left side an the three middle lights work nothing on the right side turns on

asked by: Justin W

Expert Reply:

The blinker/brake lights are carried on one circuit and the running lights are on a totally different one. Since the stop/turn circuits seem to work on the left side but the running lights on that side do not you need to check the wiring of the running light circuit that runs to that side of the trailer and fix as needed.

I attached a diagram of how a trailer is normally wired as well as a help article that covers troubleshooting trailer wiring as well.

expert reply by: Jameson C