On my 95 6.5L I just changed out blower motor it was bad. Now blower motor is blowing but no air is coming out of vents, defrost nothing. It just blows cold to very little out defrost. Any suggestions maybe relay. Or temperature controls are shot
Double check the ground in the blower motor harness behind the glove box. It is the 2 pin plug with a red and black wire in it. The ground wire to the blower motor is the one for the whole A/C unit, and if it messes up, it won't blow out air as the mode doors will go closed or close off airflow.