Forum Discussion
MPD56
May 11, 2016Explorer
Just my 2 cents
The "trailer wiring fault" is just that. The controller knows that a trailer is connected and if it doesn't like the current it sees by monitoring it. Since you have tried it on 3 other Ford IBC controllers it might not be them. You can get this message on a ford without a trailer connected (I did on my 08)caused by road salt in the truck's trialer connector.
I have a 2013 F350 now and the IBC acts different then my 08 and different then a 2015. One reason is the transmission or engine braking. Also the IBC monitors foreward momentum so it is hard by seating in the dirver's seat if the controller is working. I have a brake controller tester/simulator.
My guess is your problem is caused by a electrical problem on the trailer and not a mechanical problem. Most likely a wire on the brake magnet circuit because that is what the controller monitors to give you that message.
The "trailer wiring fault" is just that. The controller knows that a trailer is connected and if it doesn't like the current it sees by monitoring it. Since you have tried it on 3 other Ford IBC controllers it might not be them. You can get this message on a ford without a trailer connected (I did on my 08)caused by road salt in the truck's trialer connector.
I have a 2013 F350 now and the IBC acts different then my 08 and different then a 2015. One reason is the transmission or engine braking. Also the IBC monitors foreward momentum so it is hard by seating in the dirver's seat if the controller is working. I have a brake controller tester/simulator.
My guess is your problem is caused by a electrical problem on the trailer and not a mechanical problem. Most likely a wire on the brake magnet circuit because that is what the controller monitors to give you that message.
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