Thanks for all the suggestions folks. I've accessed the converter and identified that it is not the problem. My hypothesis now is that the knuckle-head I paid to winterize my RV mislabeled the leads going into the battery compartment. There are four of them and he labeled two as positive and two as negative. One of the negative (ground) wires is clearly a ground - it attaches directly to the frame. The other disappears into a wiring harness so I suspect that it is mislabeled.
So the question of the hour for the other Thor owners is this: if you also have four leads (i.e. battery cables with ends that attach to posts) in your battery compartment, how many are connected to the positive terminals and how many are connected to the negative ones? Do you know what the leads are for (e.g. one to the inverter, one to the emergency start switch for the chassis, one for accessories, etc.)? When I say four leads, I am excluding any jumper wires that are used to connect the positive terminals to the other positive terminals in a 12V parallel configuration. I'm talking about four leads that eminate from the coach into the battery compartment.
Hot on the trail - thanks for the help! I really wish Thor had wiring diagrams....
Thanks,
Bill
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