How do you diagnose a bad trailer brake controller?
Use a circuit tester, and check the red wire that exits the rear of the controller. This wire should only go hot when the brake pedal is pressed. If this checks out ok, then the controller is bad and must be replaced.
How do I reset my electric brakes?
Here’s how to reset it;
- Switch the ignition to the ON position and shift the gear lever in PARK.
- Pull and release the EPB button to activate the electric parking brake.
- Pull and hold the EPB button until you hear a mechanical sound, then release the button.
Is there a fuse for trailer brakes?
If the trailer brakes will operate with the manual switch, but not when the truck brakes are applied, check the CHMSL fuse in the fuse box under the hood. The lid to the fuse box will have a legend that will help you locate the fuse. Your trailer brakes might simply need adjusting.
How do I know if I have a brake controller?
How Do I Know If My Truck Has a Brake Controller? Most trucks come with a brake controller installed by the manufacture (OEM). The brake controller usually has an image of a trailer and you would see a dial and two small knobs.
How do you connect a brake controller to a trailer brake?
Since the brake controller has power and the trailer brakes work properly when the manual lever is activated, the black blue and white wires are connected correctly. You will need to connect the red wire from the P2 brake controller to the cold side of the stop light switch.
Why does my brake controller not work with my trailer brakes?
Sounds like your brake controller will apply your trailer brakes if you apply the manual override lever but not when you press the brake pedal. This is a fairly common problem and the solution is the red wire of the brake controller.
How does the manual override work on the trailer brakes?
When you use the manual override, it bypasses the need for a brake signal on the vehicle and applies power to the trailer brakes. That is why it works when you hit that button.
How do you test if the controller is working on brakes?
Use a circuit tester, item # 40376 if needed, and find the wire at the brake switch that has power only when the brake pedal is pressed. Connect the red wire to this circuit. The .c. in the display of the P2 indicates that you have the boost feature engaged on the controller.