sounds to me like your blower motor went to crap. if you dont have a voltage meter and you have some extra wire hanging around then what i would do is pull your blower motor. its 3 screws and it comes right out. easy. take the extra wire and hold a piece on each terminal and run it to your battery posts see if it spins. or, go to your local auto parts store and just buy a new one but make sure u can return it if it "doesnt work". plug it in and leave it just sitting on the floor before you bolt it up. turn your fan on and see if it spins. if it does then bolt it up.
