I have a 1992 Acura Vigor heater/AC fan problem. I don't think it is the fan motor itself. Everyday it will work on the first starting of the car(most of the time). It will start blowing air in the car sometimes when I'm driving on the freeway (the fan comes on). Once the fan is on it stays on until I turn it off, then nothing on the next attempt. Once it came on when I hit a bump, thus I think it is in the switch or electrical connection. Any advise?