I just did what you said.
I still have 12 volts at the purple/blue wire at the motor.
And I ran a new ground wire from the battery right to the motor.
The motor still doesn't run.
Looking at the diagram with the a/c in the schematic.
The purple/orange wire goes into the a/c circuit.
The fan stopped working when it was in the a/c mode.
Maybe something in the a/c is drawing the power away thru this wire, maybe thats why I get 4 volts on the motor when I put it it a/c mode.
I am going to try to disconnect the purple/orange wire from behind the control switch to elimanate the a/c circuit all together.
This should give me what schematic 1 shows.
Hooking the purple/orange wire back up should give me schematic # 2.
