Your talking the blower motor? I'm not sure of model or litre size of engine, I looked at info for a buick century. Maybe a problem with blower relay? Voltage to the load side of relay is hot all the time, as long as the relay isn't energized, nothing happens. Voltage to the coil side of relay comes from the htr/ac fuse, through the hvac controls. Also, check the htr/ac fuse, that fuse circuit should not be hot, voltage, with key off.