Okay so I tried searching where the piece is located for this issuse and I'm having no luck. I currently have a 2002 chevy prizm and my back defroster will work on occasions. Power is at the dash and the light indicator goes on everytime but there's times where I need to de-fog my back windshield and it just doesn't work. My blow motor was broken awhile ago and I fixed that. I'm just looking to see where it could possibly be located and fixed. I have a 7 month old and I can't be driving blind at times. I'll appreciate any feed back please.