Cadillac: 89 Coupe DeVille ac blower fan will not shut off, coupe deville, blower fan

Question
89 Coupe DeVille  ac blower fan  will not shut off. we have to unhooking the battery to get it to stop..any help please

Answer
In all my years I have never seen a blower motor that ran constantly. The only 2 things it can be is the POWER MODULE for the blower motor or the BCM computer.

I can e-mail you PICTURES and test procedures for you to do. E-mail me at: onlineautohelp@msn.com