It's been a long time since I had the outlet you're talking apart but I think it's at the end of the line. I ran a wire from there to power an outlet I added to the lower edge of the dash where it is much more convenient. I would try to determine what other outlets are on the same circuit and check those outlets for your problem. I've disassembled many areas of our mh and I don't recall ever seeing a true junction box, in fact I've added junction boxes when rearranging some of the wiring and to add more convenient outlets. if you have a tv on that wall you might check that outlet first.Good luck.
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