What Causes The Trailer Brakes To Stay On When Brake Controller Shows OC At Random Times

Question:

I just returned from a trip. The current brake controller gensis continues to display OC at random times. When this occurs, my brake lights will be on even if the truck is not in use. I am preparing to order a new brake control P-3, but want to be sure its the old controller and not something else. Factory 7pin in bumper, blue plug under dash. What do you think? 2006 dodge ram 2500 megacab

asked by: Jeff

Expert Reply:

OC would mean open circuit, which means that the trailer is not connected. The brake controller does not recognize a connection to the trailer. It will also show OC if you are using this brake controller with an electric over hydraulic braking system on your trailer.

The problem is that the trailer brake lights are coming on when your controller is showing OC even if your 2006 Dodge Ram 2500 is not in use. I would recommend to test your brake controller to see if it is working correctly, but you will need to test it when the OC is displaying, to be able to find out if the controller is the problem. If you test the controller when the OC is not showing it could test fine.

I am sending a video link that will show you how to test your brake controller to tell if the brake controller is working correctly.

Another trick to try is to slide your manual slide lever back and forth maybe 10 to 15 times to try and get the dirt or dust that might be built up between the slide and the metal strip that is inside the controller. This could possibly be causing a connection problem.

I think the problem is going to be with your brake controller but you still might want to also check the blue brake wire going back to your trailer connector and the red wire that attaches to your stop light circuit at the brake pedal.

The Tekonsha Prodigy P3 Brake Controller, # 90195, is our top rated brake controller and a good choice for your 2006 Dodge Ram 2500.You can use the vehicle specific wiring harness # 3020-P for a quick connection install.