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No wiring diagrams are available I am sorry to say. Fleetwood got rid of them when they quit making towables. I would get a 12 VDC test light like you can find at most automotive or hardware stores and use it to test all the fuses and leads into the switches. Be sure you don't have a bad one there first. Then if that all checks out, you can go up to the fixture and see if a hot lead came loose or dropped down and is not allowing the completion of the circuit. You may have to take the fixture off to see and even use a small dental mirror to see down or up inside the wall. That may be where the hot feed from the switch comes in. This will take some time and patience if it is in the wiring unless you just have a loose lead there. Hope that proves helpful here. Please get back to me if you need more later as all follow ups here are included in our fee.