i have a 2010 f250 superduty with a factory installed electric brake controller, used it two weeks ago on a borrowed trailer and all worked well. my brand new trailer came in monday picked it up and when i loaded it went to set brake controller but it will not atuate trailer brakes. i have checked trailer and the brakes do work and truck will actuate them if i use the slide switch on controller. so is the problem in my brake pedal switch or is it in the trailer wiring? oh by the way all lights work like they should just not the brakes. any help would be appreciated.