I've been hauling a boat from the day that I got the truck. My old boat trailer had surge brakes. This new trailer has surge brakes but it has a solenoid on the trailer so when you back up the brakes don't come on. Initially I found that the wire which would go to the reverse light was never hooked up. I took it to the car dealer to hook it up. Something wasn't correct. The car dealer said that the pigtail that I got from the boat dealer was crossed. I went to the boat dealer and had it checked out. We found that the wrong wires had power going to them. We adjusted the wires to correspond correctly. I tested it last week and it seemed to work properly. Yesterday I went for gas and everything worked. When I was driving to the marina was when I had the meltdown. I found that the red (hot) went from a terminal around the fusebox was never fused. I believe something grounded out. Maybe the plug? The truck frame? Anyways it kept drawing until the insulation melted and the wire broke apart. ??