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Lots has happened since the last update - several more parts (part of wiring harness again, instrument control panel, powertrain control module) replaced to no avail, FSE still bamboozled and was talking about calling in a higher-up engineer from Detroit, all signs pointing to an absolute freak...

Dude, I wish. Still stuck in total purgatory on this. They're replacing the brake control module again and the wiring harness, should be done today but their hopes are low that it'll actually fix it. Good luck, I hope yours is a simple fix!

1. I am the second owner, but I bought it with such low mileage that it's still under the original factory warranty. 2. Truck was manufactured in Kansas. It just happened to be sold in Canada the first time it was sold. It was imported back into the States by a non-Ford dealership and sold to...

Once again, Ford never fails to stun me. My truck has been in the shop since 4/21, 2.5 weeks of which was waiting on the field service engineer to decide to answer the dealerships' calls and schedule a visit. He came in on Wednesday and said some ridiculous stuff about how my truck doesn't...

It's definitely a mystery, I'm just thrilled we've gotten to the point where everyone agrees that the problems are real and doesn't think "Oh God, here comes the crazy trailer brake girl" every time I roll up to the dealership. 😆 Life could always be worse. At least I have a trailer to live in...

Hey guys, sorry for the delay. TL;DR it's back on Ford once again, they're tagging in a field service engineer to come up from another state and take a crack at it. Spent a whole day at the dealership with the service manager driving around. We towed my trailer with the working loaner F150, all...

I do! Good theory but I don't think that's it - it's a new trailer that came with them from the factory, not an older one that's retrofitted. When I get the weird trailer wiring fault / trailer disconnected errors, the lights and turn signals on the trailer stay working. The brakes are the only...

Yeah, I've tested them - slide brakes yes (sometimes), pedal brakes no. On the loaner truck both are great, I can actually hear my trailer brakes hum if I listen by the tire while the brake is applied. I'm just one person so this type of testing is kinda hard to pull off lol. I can also just...

Awesome! I bought a 2023 Ibex 20MDS in early February and have been living on it fulltime since. Love it so far, only a few minor issues that are expected when breaking in a new travel trailer. Will all be fixed under warranty. Can't tell you how often strangers come up to me gawking about the...

Oh, word, I gotcha - it is indeed buried in the menus. I have the XLT without the fancy dash as well on my actual truck - mine has the tiny rectangle screen. If memory serves it's something like menu -> towing -> trailer info (?). That way you'll see the brake output bar all the time. It won't...

Hate to tell you dude, but then you're probably having the same problem I am - this '22 loaner shows brake output when I press the brake pedal. Granted, you gotta navigate to that screen, but you should be seeing it light up unless your gain is at zero. Take a look at this video of me testing it...

Hi all, unfortunately the nightmare continues. A Ford dealership found issues with my trailer wiring harness and replaced it. This seemed to solve the trailer wiring fault / trailer disconnected errors, but I still did not see any brake output bars displayed when using the pedal brake...

Not any significant signs, but I gotta assume that if they took the trouble to upgrade an XLT with the towing package, pro trailer backup assist, etc, they probably were pulling something. I bought the truck at less than 15k miles so had to be pretty light use. I'm now at 18k so still under...

I've tried tightening the contacts on the trailer's end, but not widening them on the truck's receptacle. Worth a shot, thank you.

Update: The dealer just called me and said they're running more tests, but that my truck might just be "incompatible" with my brand new trailer. Seems like absolute BS to me - the most popular truck in the country is incompatible with a brand new travel trailer? - I'm keeping on them. All...

Thanks for the reply! Yep, the brakes worked fine on the GMC. We've done a lot of the basic testing already - I just made a new thread going into all the detail if you're interested at all.

Messaged. Also made a thread just now going into all the detail.

I have a 2021 F150 XLT 3.5L GTDI V6 (VIN 1FTFW1E8XMKE08562). It's a 4x4 Supercrew with a 3.55 axle ratio and 145.5" WB. Build date says 06/21. It has the regular trailer tow package, not max tow, and it came with a factory trailer brake preinstalled. I bought it used a few months ago and it...

Sorry to resurrect such an old thread - but did you ever figure this out? Having the same nightmare issue on my 2021 F150 XLT with a brand new travel trailer. Already had the trailer inspected and the wiring has no problems, tows fine with my buddy's GMC. Recall update was already applied before...

Thanks so much! Everything I can eliminate puts me one step closer to figuring out what the hell is going on lol.