We just purchased a 2001 Coleman Sea Pine. We are brand new to this type of camping. I have a few questions I'll ask them in separate posts. I have a battery question. We have two 6v batteries. There were no wires going to them, they weren't wired, they were just sitting on the front of the trailer. There's a set of wires from the trailer just hanging there next to the harness. Once I plugged in the trailer I checked the voltage and saw that I had 12v. So I thought that if I was to wired up the batteries that I could charge them before our trip. I wired them up in series and checked voltage and I had 0v. I went inside and checked the convertor and the fan was no longer spinning. It was kind of pulsing but not moving. I then disconnected the wires from the battery and the fan on the convertor started spinning again. Two things... One it seems that I can't use the convertor to charge the batteries. Two, here's the weird part. When I checked for voltage I checked my Red lead to the White wire and my Black lead to the Black wire and I was getting -12vdc. Red to Black and Black to White I got +12vdc. Am I missing something here? Assuming the batteries were charged, do I need to disconnect them when the Convertor is running off of 120v? Is there some type of reversed polarity thing going on because either the source would be the batteries or the 120, so then because it's coming from 120 it's reversed??? But then if it were coming from the batteries then the White would be + and the black would be -??? There's also a disconnect plug at the front end by the batteries. But the wire for the Breakaway Electric Brake is on the battery side of the plug. So if this is unplugged then the breakaway switch doesn't do anything because it's not connected to the wiring harness. Last question... what's supposed to happen when the Harness is plugged into the TV? Does the TV charge the batteries while you're driving? I haven't been able to test this yet because currently my TV only has a 4 flat harness while the Trailer has a 7wire harness. I know that was a lot. Thanks again for any advice you guys may have.