What Would Cause Pilot Brake Controller to Read a Connection With Vehicle Off

Question:

My pilot brake controller shows a c when connected to trailer even when trucks ignition is turned off. Is this normal

asked by: Ronnie

Expert Reply:

Try cleaning the pins of your 7-way at the rear of your vehicle. Most likely there is a bit of corrosion there that is putting a slight draw on the output circuit for the brake controller. This will cause the controller to get a false reading for a connection.

expert reply by: Jameson C