I have a 2003 Monaco La Palma on a W22 workhorse chassis with a 8.1 motor. I recently installed a trailer brake controller, all was good for about an hour. I lost the brake lights to the trailer. All the lights work on the coach, I have left and right turn signals, taillights, and trailer brakes on the 7 pin connector. I have checked all fuses, relays,brake light switch on the brake pedal,wires and as far as I can tell there is no converter in the wiring that I can find. Anyone have any ideas on how to fix this problem.