I have no rear heat in my '04 Freestar. When you activate the switch, front or rear controls, I hear the relay click but the motor does not spin. I put twelve volts direct to the motor and it works perfectly. I have voltage at the plug to the motor as well. I tested the relays and they are good. I also tested the resistor and it checks out. I swapped and replaced the relays and swapped in another blower motor just to see. Nothing changed. If you switch to A/C I hear the flapper door switch positions. The front works perfectly. Can anyone help me figure this out? Thanks