slider won't close

Mine is the bedroom slide in a 5th wheel and is an "Above the floor" slide system. If I remove the plywood under the bed to access the manual crank to close the slide, I cannot get out of the bedroom. I got on-line and there are a couple of manuals out there for the types of Lippert slides. I'm going to start trouble shooting today, since my slide stopped right after we returned from camping, fortunately in my driveway. According to the Lippert manual, and my dealer, motor, switch, fuse. First step is to access the switch panel and test the switch, maybe swap with a working slide. Also, RV's are famous for jiggling wires loose, so check for loose wiring, which should be found while testing the components with a volt meter.