[Carl n Susan]

Originally Posted by whutfles

<snip>...We have 2 DC lights that quit working last year - one over the dinette and one over the couch - all in the large driver's side slide. No bad fuses and connections all look good at the lights in the ceiling and no pinched wires visible under the slide. Just no power at the lights. i suspected a loose connection at the fuse box for that problem...
</snip>

This is a common problem. There is a junction box under the slide in the back corner. It frequently leaks and causes corrosion of the 120V and 12V wire connections inside. Remove the cover and check for 12V there.