Ac fan not working at high speed?

ether the blower motor or the blower motor resister is bad. it could also be the contact in the speed switch in the dash. i woul try the blower resister first it sthe mos t inexpeceve. on the 96 model it is on top of the blower box on the passanger side be hind the glove box remove the glove box and there are some relays in the way remove those bolts and then remov the two bolts that hold the resister in. its a tight spot so take ur time