I just replaced the blower motor on my 91 Beretta and it still doesn't work. The heat works fine, it just trickles out of the vents, but when I turn the fan up nothing happens. Before replacing the motor, I cleaned the connections to it and it worked for a day and then stopped. I don't know what else could be the problem.

Maybe you already had your problem fixed. While plugged in, wiggle the wires going to that connecter, maybe try cleaming them again.