From what I've heard, that Taurus fan is a pretty healthy unit, pulls like 50 amps, or so I'm told. Sounds to me like the motor is shot. What I would do to test it, is disconnect the fan motor from the controller. Run the wires right to the battery. CAREFUL!!!!! If the motor is shorted/bad it's gonna look like you're welding when you touch the wires to the battery!!!! Just a real quick glancing blow at the postitive while you hold the negative on. If the motor is good, it'll turn over. Now because it's such a high amp motor, it's gonna spark quite a bit even if the fan is good, just cuz it's pulling so much juice. With me so far?
If the fan doesn't move, the fan motor is bad. If the fan starts and runs, the controller and/or wiring is bad.
BE CAREFUL!!! And good luck! Let us know!
