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Message: <blockquote data-quote="Bantou" data-source="post: 523446" data-attributes="member: 36587">There shouldn't be an shorts to ground (though there could be). I was very careful not to drag the wire over any sharp edges and I left slack anywhere that it might bind or rub. With it being brand new wire and only having been moved less than 100 yards, I'd be very surprised if it had already rubbed a bare spot anywhere.  I used the trailer frame to conduct the ground though, so a bare spot on the positive side could definitely cause a direct fault.  I remembered last night that I had one of those inline snap splices in the ground wire for the plug. I'm going to change that out for a heat shrink butt splice before digging into the trailer wiring. I'm a big fan of starting with the KISS (Keep It Simple S.....) method of troubleshooting. If it's not the splice, and the fuse is appropriately sized, the I'll start hunting for a fault.</blockquote>