hvac fan is cutting in and out, need a lil help

[indust82]

My hvac fan has been cutting on and off for the last few months, but it used to be working most of the time, but lately nothing. I think my prob is a loose wire because for a while it would cut off when i hit a bump, and then be back on when i hit another bump. Can anyone give me an idea of what to check first and the best way to get to the damn fan. I'm far from a mechanic so all details would be appreciated.

 

[Psychostang]

I believe there is a tech article about this.

Edit: Here you go....http://www.lincolnvscadillac.com/tech/lincoln-mark-viii/blower-motor-repair/index.htm