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Perhaps it is the switch. Do you have a 12 VDC test light so we can check that? About $5 or so at most hardware stores. Get back to me when you are ready to test. You need about 10 ft of wire for a test ground and a couple of alligator clips.
I would check the switch just to be sure. If you contact Fleetwood Customer Service at(###) ###-####and give them your FIN number they can get you a set of wiring diagrams. I don't have access to those. Hopefully it will included that circuit. If the fuse is blown, you would want to know what caused that. And this would take some testing as well. Once you have the diagrams or if you need help with testing the switch, get back to me as all follow ups are included in our fee.
Just checking back to see if you were able to get the wiring diagrams from Fleetwood?