The local cemetery let me use their dump trailer to haul their excess sand away. The dump trailer has its own battery and I was told by the manager of the cemetery that it is supposed to charge off the tow vehicle. Another time I was told by a young cemetery worker that the charge feature doesn't work. Today the battery died. We tried charging it with jumper cables but darn near burnt out the cables, and blew some fuses on my truck. After examining the way the battery was wired into the dump trailer I see they had a black cable running from the positive to a bolt on the trailer frame. The negative terminal had two red wires, one coming from the trailer-light connector and the other going to the hydraulic pump. I understand now why I burnt out my cables and fuses. My question is: Is this the right way to wire the battery for the dump trailer? Positive to frame, negative to hydraulic pump?