I can't figure out what this thing powers. the plug that is plugged into it goes to a junction box on the fire wall. I don't see a switch on the dash to turn it on. I start the motorhome up and see if anything comes on like an A/C unit or the fridge,, nothing. The owner's manual for the Holiday Rambler is a piece of worthless nothinglness and doesn't say anything about this generator. Does anyone else on here have a motorhome with one of these motor/generators in their rig? please let me know. thanks so much