Originally Posted by Len Dave
I have a 2016 F-150. Last summer (2019) for the first time I started getting the "trailer disconnect" warning when towing my Coleman Niagara Camper. Lights on the trailer stayed on and the trailer/truck connections appeared solid. Eventually the warning stopped. I will soon be towing a trailer that weighs almost twice as much. First, I need to know will my trailer brakes be working (at their optimal levels) if I get this warning again (and my connection appears solid)? Second, if you have had this message appearing my error what have you done to resolve this problem? Thanks in advance for reading the above and responding - Len Dave
Hi, something for you to check maybe?? NHTSA (18E014000) safety recall on some trailer - camper shell wiring harness connectors. Mine was on a Leer. On mine, this was definitely the problem and was testable using a water hose on a sunny day.
If you had a camper shell on it at some point in the past, the shell's harness may have been still left in place as it is out of sight and out of mind.