My son recently had a similar issue with the lights in his super slide not working. The problem was finally traced to the wiring harness underneath the slide out. A screw had penetrated the insulation on the wires thus causing a short. In his case the fuses kept blowing due to the short. Perhaps in your case, there is the possibility of wire connections pulling apart or other issues like mice chewing though the wiring underneath the slide. We were surprised to learn that the problem was outside, underneath the slide as opposed to hidden in the walls. We came very close to ripping out the wall panels, but opted for an RV Specialist instead. That turned out to be both a cost savings and avoidance of a much bigger mess!
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