wiring fault on trailer

The 2008 Fords (well all the 6.4L years) are notorious for this error message. Ford even issued a TSB about it. The standard 7 pin receptacle assembly allows water and dirt to enter it and causes shorts. Clean the receptacle as best you can and try to seal the back of it with something (silicone, duct tape or ??) to prevent further intrusion.

All of us usually have a can of WD40 in the door storage. I squirt some WD40 into my 7-way trailer connector on my pulled trailer everytime I hook up. I move the 7-way plug around real good a couple of times to make sure the contacts all get exerised abit with WD40 spray.

Seems to work good for my trailer connections...

My 2010 FORD TRUCk has the built-in OEM brake controller and I sometimes get the disconnect message on my info screen. This seems to be more sensitive than my previous Prodigy after market Brake Controller.

I am a WD40-DUCK TAPE fixit guy here haha...
Roy Ken

The trailer wiring may be your problem. Check where the wiring goes inside the trailer axle. The rubber grommet may be gone where the wire enters the axle tube and is shorting. There will be a hole near each axle hub. 4 holes total.

The wire inside the axle tube sometimes wears and shorts. Requires replacing the wire and I suggest routing outside of the axle.

If you have the fault most of the time disconnect one axle at a time and see if the fault clears.

When making the connection either use a butt connector and make sure the wire is corrosion free or solder the connection. Then use some marine grade heat shrink to cover the connection. Harbor Fright has the marine heat shrink or any marine supply house should have it.

My 08 Ford gave me the Disconnect signal intermittently, turned out my auxiliary freezer came unplugged in the front compartment. The TBC is pretty sophisticated.