So I have a 2007 3023. There are 3 blade fuses on the battery, all checked good with a meter. I took another look at the converter, and there is a 30A circuit labeled "tongue jack", which is not correct, and that fuse was blown. That circuit is the whole 12 volt interior, lights, pump, fan, everything. The tongue jack worked with that fuse blown, so I never checked it. The jack is apparently wired directly to the battery. My unit is stock, so I guess it was wired this way from the factory.
Thanks for all of your help, this forum is the greatest. Happy New Year!
Rob
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