Trailer connection wiring question
We recently traded up to a 2012 Forest River Encounter by Coachmen on the Ford F53 chassis. I am installing an electric brake controller and got some great help from Nate at Forest River and from a photo I found on line that helped me find the brake controller wiring harness under the dash. Easy plug and play installation so far but I am not getting a signal for brake lights or turn signals on the factory installed trailer connection plug at the rear of the coach. Tail lights, electric brake signal, and the ground wire all check out. All wiring seems to be intact and plugged in to the frame end wiring harness. Am I missing something here? The brake lights and turn signals are separate on the coach but are combined at the plug. Is there an adapter that combines both signals and sends it to the trailer connector? Could that be the missing link?
Any help is appreciated.