New to us 2002 Fleetwood Tioga Class C. Yesterday we prepared to leave camp we retracted the slide, no problem. When we arrived at the new campsite the slide wouldn't extend. Camper was level, engine running, emergency brake on. As far as I know, those are the required conditions to extend the slide. I did the old "Turn it off and try again" routine without any success. I checked all the fuses and breakers in my distributor box, no problems found. I'm certain it has a 12V power source somewhere. Since the engine has to be running, I'm guessing from the engine electrical system. Where would I find the fuse/breaker for it? I've searched without any luck.