Electric issues...no air blowing!

[adidas]

hey guys. the other day the blinkers, rear defrost, and (most importantly) the motor to blow air from the heater/ac stopped working! when i have my key turned to the "on" position everything works fine but while its running, those three things go out.
the fuses are fine...
anyone have any idea what it could be?

 

[Saleen0679]

Often symptoms of a failing ignition switch. Sometimes you can jiggle the switch and bring back the affected accessories.

http://www.mustangmonthly.com/howto/5657/