heater fan

My heater fan seems to have died. It doesn't work at all, then if i hit a bump while driving it will come back to life. I was just wondering if someone could give me some info on where it is located, possible problems, and ideas on how to fix it myself.
92 corolla.
Thanks

heater fan i located infront of the front passanger, behind the glove box compartment (that needs to be removed to get to it) The carpeting and other stuff are covering it. you can get a manuel for less than 20 bucks to help you out at an auto store... remember to check for loose wires before you decide to replace the whole thing