Had something wierd happen this evening while driving my truck. I received a call and answered it using Bluetooth. Out of the blue, I got a message that my trailer was disconnected. Great...I wasn’t pulling a trailer. Short time later, it displays it again so I pulled over, went to the trailer screen and made sure no active trailer was selected. Drove a little further and it kept popping up....

At the next stop light, I turned the truck off and back on, drove along and it kept popping up...

Made it it to a stopping point so I turned the truck off, opened the doors, waited a few minutes, and started the truck back up. Im still on the call at this point and when the truck started back up, the call reconnected to the sync system.

Right away, I got a message that my exhaust brake was on (it was in when I turned the truck off, but I did not hit the button after the restart. The exhaust brake light was lit) and that my non existent trailer was connected. I went to the trailer screen and it showed the last trailer I pulled was connected, so I selected no active trailer.

As I drove home (still on the call) I kept getting repeated trailer connected/disconnected, turn signal, and brake lamp warnings. These were popping up almost non stop now....

I ended the call and everything went back to normal. No issues the rest of the drive home.

With all the rain we've had recently, I’m wondering if I've got water in a connector somewhere (a la the tailgate dropping issue). I’ve never seen this before. Any ideas?

That’s exactly where I’d look first too. Seems like the one that most often is the issue is located on the inside of the passenger frame rail next to the spare. I pulled that one apart the first week I had the truck and stuffed it with dielectric so hoping I never have any issues with it!

I've read enough on here to know I should have done that myself. I’ll be checking that one tomorrow. I actually have to pull a trailer tomorrow for some distance, so it should be interesting to see what happens. I hope it’s not a long trip with constant messages popping up.

It’s water in your 7pin trailer wire harness. You can’t just blow it out. Water got in where the wire harness connects to the 7pin. You have to drop the spare tire, unplug the harness, remove the 7pin plug and exchange it at the dealer. When they give you a new one, they will expect the old one back. When you install the new one, use a lot of dielectric grease. You will see that Ford used little to no dielectric grease on that adapter and that causes the fault. When you are under your truck pulling the adapter out, it’s a good idea to add dielectric grease to the other 2 or more harnesses near the spare tire. I’ve posted numerous topics on this. There was a service advisory as well. You’re welcome. See photos of what you need

Just the front windows? All the way down? If so, you might of accidentally held down the unlock button which activated the automatic open window feature. I have not heard of open windows being associated with the trailer plug before.

Makes sense to me. Luckily, I haven’t experienced it again (and did a long pull yesterday) but I’m sure it’s only a matter of time. Thanks for the info!