Brake Controller Says No Trailer Connected with Trailer Connected to 2014 and Newer GM Trucks

Question:

Plugged the brake controller in using part number 3016 and I am getting the no trailer connection reading. Trailer is connected connector not corroded where do I began to look and what next?

asked by: Stokes

Expert Reply:

On some GM trucks the tow package wiring is not completed under the hood but I have not heard of this being an issue on models that use # 3016. It sounds like the connection is not complete from the front of the truck to the trailer connector at the back. The easiest way to resolve this issue is to manually run a wire such as # 10-1-1 sold by the foot from the brake controller blue wire back to the 7-Way where the wire will attach in the 7 o'clock position.

But you could trace the wire that is already there forward under the truck to see where it goes. It is possible that it terminates somewhere under the hood and just isn't connected to the other end which terminates where you plug in 3016.

expert reply by: Michael H