New cooling fan assembly unit isn't working. We have replaced it with two new units and it isn't working. If we take the old module off the old unit and put it on the new unit they came on but run slowly when the ac switch is on, and turn off when the compressor unit comes on. My husband unplugged one of the fans and one runs fast and keeps the air cool and the car is not getting hot. Is it the pcm or the module? Does the module have to be programed for my edge?