NHTSA Complaint #11521203 — 2021 FORD F-250

During towing of 10,000lb trailer, the trailer brakes cut out during heavy braking and the dash displayed "wiring fault". Also, sometimes during normal braking, the trailer brakes will cut in and out, if you watch the gain meter during these episodes, the gain meter will also cut in and out. My and my families safety was definitely put at risk and now we were fully dependent on only the truck brakes to stop our vehicle and trailer. The dealer checked the vehicle on 5/9/23 and say there is nothing wrong with the truck. There is an active safety recall (22S17) covering trailer brake controllers for Super Duty vehicles, however, it seems to be limited to model year 2022, even though my vehicle was built at the same plant during the same time period covering this recall. I intend to have the dealer perform the required repair at my expense, and hopefully this recall will be expanded to cover my model year. This is a very dangerous situation.