Got this message randomly on my 2010 Ford F-150. Wife read the book last night for me, said possible high current drain is a possibility, if only happens with a trailer attached, problem is the trailer, if without a trailer, in truck. Mine was only with the trailer.

So ran some jumpers bypassed the wiring to trailer brakes, same problem, then cut axle wire off, solved, bingo, read online somebody had a wire rub in two inside the axle. This is the wire that goes to the other side. Intermittant, high vibration, rubbed the wire bare, caused a short, rewired problem solved.

Easy, right, now let me tell you the rest of the story…..