Originally Posted by jk510
Stop worrying about the converter. That can only confuse things. We know that's okay and all the wiring from to breaker/fuse panel because it all works when you're plugged in to shore power. You need to trace the wire back from where it connects to the wire from the converter 12v line to your battery. There's a break somewhere along there.
Sound advice. I think I'll swing into an auto parts store on the way home and grab some 6AWG wire. At this point spending this weekend pulling wires is the easiest option. I removed the converter and took a look behind it where the wiring comes into the trailer, it all looks intact, but who knows what is unseen.
If I get lucky maybe I'll discover a previously unknown in-line fuse, or some other easy fix