Originally Posted by jorb
You should have it wired in this order:
Ignition 12 volt ON Switch > 12v to 6v Voltage Reducer > Fan speed switch > blower/fan motor.
This specific topic has been discussed before.
It does not matter which order these components are arranged.
In fact, you could put the resister between the ground wire of the motor and chassis ground and it will still work.
Electricity is "special" like that.

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission