If this is a manual control unit (dial - no setting a numeric temperature), Fuse 10 (40A) powers the blower from the front blower relay in the integrated power module. If fuse 10 tests OK but no power to either terminal with the blower on the relay is probably bad.
If there is power there but no blower it is either a bad resistor module or fan motor.
The resistor module is behind the dash on the right side. The blower motor is powered from a dark green and a black wire. If you apply 12 volts + to the black wire and ground the green wire the blower should spin just like it does on high speed.
Thursday, January 12th, 2017 AT 7:29 PM