2021 F-150 Brake Controller problems

Guessing that these fairly new 'highly integrated' OEM brake controllers are running in 'open loop' and the master/slave & it's lookup tables are a mess...not all the time, but occasionally gets into a state that the +100 computers get confused...ABS, traction control, sway control, engine/tranny computers, etc

Suggest to you all on that forum to consider a trial where one would install a P2, but leave all the OEM TBS wiring alone.

A dedicated trailer brake controller only deals with ONE external thing...the trailer brakes. Yes, it has inertia sensors, etc, but it is a standalone system NOT tied into the complex TV's systems.

Betcha the problem goes away

In terms of troubleshooting, my trailer (not that old, 2016) worked flawlessly with my old truck and Prodigy P3. As soon as I switched to the new truck I had problems. I assumed it was trailer/brakes related.

Took it to a trailer mechanic (not an RV shop), he had a once over everything, tested it and gave it a 100% clean bill of health. My 7 pin is in good shape. So that is what led me to it being a truck issue. Others on that forum have done similar exercises, and many have brand new trailers.

So while agree, much can go wrong in this "system" of truck/trailer, I am fairly confident it's the truck and some sort of software issue.

My hunch, unverified, is that the resistance threshold for the truck knowing a trailer is connected is too low. And it's bumping in and out of thinking the trailer is there or not.

Lynnmor wrote:
I didn't read the whole 15 pages, but it seems to me that there are those that did incomplete troubleshooting. There are more connections in the truck and trailer brakes than just at the bumper, and spreading grease is not a repair.

Well since you're discounting the fact that the Fords could have an issue, I'm sure it's something other than the trucks. Maybe you should join their forum and tell them they're all full of ____...

I didn't read the whole 15 pages, but it seems to me that there are those that did incomplete troubleshooting. There are more connections in the truck and trailer brakes than just at the bumper, and spreading grease is not a repair.

All I can say is WOW

My 7 pin connector came loose a few times back when I was towing a 6000lb TT with my 1997 F150. I had no idea the trailer brakes were not working until I tried to use them. That made for a few hair raising moments of pure terror. I would pull over, reseat the connector and be on my way.

Fortunately, I haven't had any issues with my 2011 hauling the 9000lb FW. That would certainly be terrifying.

Note to self: Avoid trading up to a 2021 F150 at all cost