I have a fairly new 12' x 6.5' trailer with the normal 4 pin light connection. My Chevy z71 has an RV connection so I use a standard adaptor to get the 4 pin to fit into the RV connection. The problem is, I keep blowing brake light fuses in my truck. It also blew the turn signal fuse. The parking lights seem to work fine. Am I missing something ? I went from a 15 amp to a 20 amp thinking that this would solve the problem but it still blew. I also blew a brake light fuse in my wife's SUV when I hooked the trailer up to it just to pull it out of the garage so this makes me believe it is the trailer. Any help would be apreciated. Thanks.