97 Pontiac Bonneville

My 97 Pontiac Bonneville has 150, XXX miles with a 3.8 non supercharged motor. Heater fan was starting to squeal because of bad bearing. One day it just stopped working. Went ad bought new replacement fan, put it in and plugged in and nothing. I tried fan out on a battery charger and it run. I do get 12 volts at plug when car is not even on though which I thought was weird. I tried plugging it in to wire with out the fan all bolted into place and still nothing. This car does have climate control. I also check all the fuses I could and they were fine. I would really appreciate some help with this soon, before it starts snowing here in Minnesota. Thanks, Brad