My heater blower only works when it feels like it, most of the time if a large gust of wind comes up or I pass a semi-truck. I would like to find out how to get to it and check it out. I can not afford to take it to the repair center, they are wanting a few hundred dollars just to look at it not including the cost of repairs. I am sure I could figure it out if I knew where to look. I know there is a panel behind the glove box but after that hmmmmm I am lost OOPS I forgot I have a 1999 F150 cab-and half 4x4 full size bed, V8