1996 Cadillac Seville HVAC Blower won't turn off on 96 Sevi

The battery was going dead overnight. I discovered that the blower was moving at a very low speed, even when the car was turned off. I unplugged the blower and the drain stopped. The a/c display inside the car seems to be going through all the motions. It opens and closes the proper doors, etc. However, it won't modulate the blower speed, even though it says it is, and won't turn it off, even through it's reading "off." I removed the old blower and direct-wired it and was still getting a speed so low that I could stop it with my hand, so I figure the blower was bad. I put a new motor in, and this one is stuck on high, no matter where I set the display, and it also won't turn off when the car is off. I figure that the motor control is stuck on high, and the difference between the speed of the old and new motors was due to the old motor being woirn out anyway. Is there a relay for the blower motor, and if so, where is it? Is there something called a Body Control Module that might be affecting this? If so, where is it? I know that there is a switch on the older Sevilles on the firewall next to the blower, but I think they changed that in 95 or 96, and there is nothing like that there. Thanks for any suggestions.