2000 path blower motor inop
 

Hi My G/F has a 2000 pathfinder with auto temp control. The Blower motor doean't work on any speeds. If I ground the motor it will run. If I jump it at the solid state reistor it will run. Do the reistors go bad or the head control unit ? The Ground side of the circut is good . The power side of the circut is good.
I have power running from the fuse 2 the blower motor out of the motor 2 the reistor. I tested the ground wire of the reistor and it is good. so either the head is bad or the reistor is bad ???? I need 2 test the contol head or the reistor to see which 1 is bad. Anybody know ?
Thanks guys