Trouble Shooting Electric Trailer Brakes Not Engaging with New Brake Controller

Question:

On our first trip on the way there the electric brakes worked great. When I hooked back up the brakes were locked up. I discovered the controller was fried. I replaced the controller and now I get a wiring fault code. The breaks are free but wont work. I checked all the fuses and they are good.

asked by: Thomas B

Expert Reply:

It sounds like your brake controller may be wired incorrectly or more specifically you have an issue with your brake control wire. This is the blue wire that runs from the brake controller to your vehicles connector. I recommend checking the wire to see if its been severed or frayed. Another wire you may want to check is the red wire to the cold side of the brake light switch. A fault or miswiring in either of this would cause your brakes not to engage. You may also want to check your breakaway pin. This could be disengaged or possibly have caused a short which could have fried your previous brake controller.

expert reply by: Jerred H