I think you missed his wording or maybe you did this already - there should be a seperate fuse on your power converter (could be a blade fuse or a resettable fuse c/b). If that's ok, it's multimeter time. Does your coach/trailer have a switch to go between shore power/generator/batteries or is it automatic? Year/Make and what we're talking about would help.
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1995 BlueBird BMC 37
2013 Jeep Wrangler Rubicon Unlimited
1984 BlueBird Wanderlodge FC35RB-Sold
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