[Shane826]

When you say “the lights on the ceiling” do you mean front, rear, or both sections? Each section is fused separately. Check ALL the fuses in the fuse block. Replace any fuses that are blown. If you replace fuses and they immediately blow, we will have to dig deeper.

Does everything else DC work? Toilet, fans, CO/propane detector, etc. If not, we have a power supply issue. Do you have a battery installed? Is the fuse at the battery OK? If you still have no DC systems working we will have to dig deeper.

Usually the rear roof is controlled by the bathroom wall (or sometimes bed slide) switch, but there are some units that the switch controls all the ceiling lights. Let’s test the switch. With the bathroom walls closed, push the switch all the way down and hold it. Lights work? Something has some give to it, allowing the switch to move. Still no lights? Cut the wires out of the switch and twist them together. Lights work? Switch is bad, replace the switch. If there are still no lights we will have to dig deeper.