i just bought a 1990 dx and the ac stopped blowing. if i roll down the window and put the selector on vent then i can feel cool air trickling in throught the vents. is my blower motor shot? i checked all the fuses and all are good.

 

Sounds like the blower motor to me. The one in my '93 never actually died but it slowly began blowing at about half the normal rate over a year or so. I didn't realize it so much until I replaced it. The difference was like night and day. Remember, it's like 17 years old now. They don't last forever.