Trailer Wiring Diagram for a 7-Way Trailer Side Connector

Published 01/26/2012

Question:

Do you have a wiring diagram specific to this 7-Pin Plug? I need to know what color on this specific model goes to what function on my trailer. Thanks for the help.

asked by: CB S

Expert Reply:

The problem that you are going to run into no matter what 7-Way you want to put on your trailer is that the color of the wires used is not standardized. Trailer manufacturers or people who rewire their trailers at any point can use any color they have laying around.

You have to go by function, and then follow our wiring FAQ diagrams which I have linked for you. The colors that we mention are the most used but are by no means definitive. If your old 7-Way is still attached you can just match up the wire locations on it to the new 7-Way. Otherwise, you have to follow the wiring back for each wire and then attach it to the 7-Way according to the diagrams.

expert reply by: Michael H