Troubleshooting Brake Controller that Only Works with Manual Override Lever

Question:

They work when I pull the test bar but when I push the pedal I have nothing coming from the box

asked by: Tim M

Expert Reply:

Did you check to make sure the red wire of your controller has 12 volts when the brakes are applied? That's the circuit that would be at fault if the controller itself is still good. I'd verify that you have 12 volts on the red wire of the controller with a circuit tester like part # PTW2993 and if it does then the controller is faulty. If not, then the wiring for that circuit is bad. You'd need to check the condition of the connection for the red wire and then also check the fuse for the third brake light of your truck as well.

For a brake controller replacement I would recommend the Prodigy P3 Brake Controller part # 90195. This is our best selling brake controller because of how well it works and how easy it is to setup. This is a proportional brake controller that senses the amount of braking the tow vehicle is applying and applies a proportionate amount to the trailer brakes. This will be the last brake controller you buy. It can easily be transferred to future vehicles as well.

expert reply by: Jameson C