Troubleshooting Brake Controller Light that Stays Red After Pedal is Released

Updated 07/03/2018 | Published 06/30/2018

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Question:

The light on the controller stays red when you release the brake ? Would like to know how I can fix the problem with the controller light staying after you release your brake of the truck. The brakes on the trailer has been check. Could it be something else?

asked by: Sharon

Helpful Expert Reply:

Since the brake light on your controller stays red when you release the brake, it is still getting brake signal on that red wire. This could be from the wiring connection being wrong or from a sticking brake switch. The controller should switch from a red light to a green light when the brake light function is not activated. I recommend testing the red wire using a circuit tester like # PTW2993.

I've attached an article to assist with testing your brake controller if that red wire does have power when you hit the brake pedal and does not have power when you let off the brake. If it has power both when you are on the brake and when you release it, then you either are connected to the wrong side of the switch or you have a sticking switch that will also leave your vehicle lights on after you release the pedal.

expert reply by: Jason S