Post by juzplanekrazy on Apr 27, 2020 14:25:55 GMT -5
While moving the trailer this weekend I got a "Trailer Wiring Fault" message. (Driving a 2017 F350 DRW) The brakes on the trailer started acting crazy, at one point I believe only one side of the trailer braked. The truck got pulled hard to the right. Thank goodness we where low speed. I stopped twice and pulled the plug out and made sure it was set in good. It would just pop back up again. I could fill the trailer brakes not working, then grab while coming to a stop. Searched around the web thinking maybe truck oriented, but seems it's "trailer wiring issues" is the best bet. Anybody have any of these issues pop up on there KZ here lately? I can deal with TV's going out, refrigerator, microwave, cabinet doors fall off, BS like that, but this is really going to tick me off it its some kind of sloppy KZ job. This is a big safety issue.
This isn't an exclusive KZ issue..Start at the junction box under the kingpin. Make sure all connections are good, what your going to find is the wiring runs down one side of the frame, then is spliced in at each axle. If all the connections (including grounds) are good from the 7 way cord to the axles, the most likely cause is a short in the wiring that runs from one side of the axle to the other. This wire is ran thru the inside of the axle, where it wears thru the insulation. Problem being is these wear spots are about this big: = . Yeah, that small a short freaks the brake controller out & makes finding them a real pain. Just run new wiring across the axles rather than thru the axles. Now, I haven't gotten into shorting magnets or the wiring inside the brake drum, but that doesn't happen all that often.
2018 Durango 318RLT '20 Ford Lariat F350 4X4 Former RVIA Master Tech, ASE Master HD Truck Tech.
Anyone experience loose connections in the trailer electrical panel? I found a loose neutral arcing and nearly causing a fire. Spliced in a new wire and tightened the lug connection which solved the problem.