Where do Trailer Wire Colors Green, Yellow, Brown and Red Run To

Published 02/08/2017

Question:

I have 4 wires coming from trailer green-yellow-brown-red . Coming from truck are white-brown-yellow-green. What goes to what?

asked by: Walter M

Expert Reply:

Most likely the colors would match with the exception of the red wire on the trailer going to the white wire on the truck. The white wire is the ground circuit so you can trace the RED wire on the TRAILER to see if it attaches to a metal surface on the trailer or to the grounds of all the lights.

I attached a help article on trailer wiring for you to check out as well.

expert reply by: Jameson C