So I have figured out on my truck it most definitely was because all of my trailers have LED Brake/Turn Signals. I added two incandescent lights (one on each side) to the brake/turn signal circuit and my truck works perfect now. Does NOT matter what kind of lights you have for tail/markers...
Anyone know if you can turn off/disable the Trailer Disconnect Alarm? Mine if I leave the lights hook up and lock my doors the alarm will go off within 5 min ever time. Ford of course has no clue as always! Thanks!