Troubleshooting Brake Controller Only Functioning with Override Lever

Question:

I have a 1999 dodge 3500 controller just stopped working I get voltage on the blue wire when I pull override but get nothing when I press brake pedal. Has what looks like a factory connector on it. Few weeks ago wire broke on the trailer and shorted out on bed just wondering if my controller is done for or what

asked by: Luke A

Expert Reply:

If you have a circuit tester like the part # PTW2993 test the red wire of the brake controller for voltage when the brakes are applied. If there is voltage when you press the brakes then the brake controller is bad but if not then the issue is that you aren't getting a stoplight signal for the controller to allow the controller to know you are applying the brakes. Sometimes this issue is as simple as a blown third brake light fuse or just a bad connection to the vehicle wiring.

expert reply by: Jameson C