NHTSA Complaint #11626055 — 2022 FORD F-450 SD

04/2022 F-450 with 13,000 miles (garaged over winter) no boat towing. Reporting the first incident/time connected to trailer with electric over hydraulic brakes is 18 months after purchasing the truck. The F-450 has intermittent power to the #5 pin (+Batt) of the 7-way trailer connection. This pin is for powering the electric over hydraulic brakes. There is also an intermittent triple chime and a visual warning of "Trailer Disconnected" when the brakes are released. When first connecting the trailer 7-way, the #5 pin has power. However if you turn the vehicle off and restart the truck without first disconnecting the 7-way, the #5 pin will not have power and the trailer does not have any brakes. In order to correct this, you need to leave the vehicle running, exit and disconnect and reconnect the 7-Way. There are no fuses blown. The wire has continuity from the Trailer Brake Control Module to the 7-Way connector in both the bed and bumper locations. There is no corrosion on the terminal ends of the wires or the 7-way connector. Di-Electric grease remains on pins/connector. Seekins Ford (Dealership) replaced the Trailer Brake Control Module on 14 November, 2024. I asked them to look into Recall 22V193, but there was nothing about it on the repair order and the service writer didn't know. Though the module was replaced, the problem persists. I took the trailer a 2024 Diamond C F-Max 212 with Electric Over Hydraulic Brakes to a servicing dealer who verified the brake system nominal. I connected the trailer to 3 other vehicles to verify the brakes operate. A 2023 Tacoma, 2006 F-250, and a Kubota Farm Tractor. The trailer brakes operated on all vehicles. I have deadlined the truck from pulling a trailer until this problem is resolved.