Ford Repair Questions? Ask a Mechanic for Answers ASAP
Thanks for coming to Just Answer to ask a question.
You are looking at a fauty module which you diagnose by pulling codes with a scan tool. Or you have ground wires to the system with resistance from poor grounding or there is water in the 7 pin connector. An aftermarket system does not work the same as the ford unit and will not display trailer disc. Since they dont have this feature.
You actually clean the ground.