Electric Trailer Brakes Lock Up when Day Time Running Lights are On for a 2003 Chevy Silverado 1500

Updated 06/25/2014 | Published 06/24/2014

Question:

I have a 2003 silverado 1500 everything works fine during the day but at night just recently when my night time head lights come on the electric brakes lock up what should I look for

asked by: Scott K

Expert Reply:

If you are using a brake controller then the likely cause is that the brake controller red wire is not in the right place in the harness used to plug into the truck. I have included a picture that shows where all the wires needed to be for you.

If you do not have a brake controller then the likely issue is a short of some kind in the trailer connector either on the truck or the trailer. You will need to make sure that both are clean and free of corrosion inside and out. You will also want to check the wiring as much as you are able to check for any breaks in the wiring.

expert reply by: Michael H