jforrest
Junior Member
I have a 2018 Ram 3500 dually and a 2007 3500 single axle. When connecting to a trailer with the 2018, all the lights, etc. work but the brakes lock up and I can't tow. Now I hook up the 2007, everything works normal. I have 4 trailers and the scenario is the same. I check all the wiring, installed new breakaway switch and still the same issues. Took the truck to the Dodge Dealer, found nothing. Next, I started pulling fuses. When I pull F30 fuse, trailer tow receptacle, all works normal, I can tow my trailers without issue. Can this be explained? And exactly what does the trailer tow receptacle do?