Troubleshooting Flashing .C on a Prodigy P2 Brake Controller

Published 04/29/2015

Question:

brake controller work flawlesley for one year since new then 2 days ago it started flashing .c. very fast then slow then fast again manual does not apply brakes, I disconnected the trailer and nothing changes still flashes .c. please advise thanks

asked by: Scott S

Expert Reply:

What you are describing sounds like corrosion on the brake output circuit of your vehicle 7-way. When the controller detects a load on the circuit (typically from the trailer brake magnets) it will say that it has connected to a trailer. Corrosion can cause a slight short on the circuit which then can trick the controller into thinking there is a trailer connected.

I would recommend cleaning the pins of your trailer 7-way with some fine grit sandpaper and the problem should go away.

I attached a help article on brake controller troubleshooting for you to check out as well.

expert reply by: Jameson C