i'm going to give it a try. just one more thought on this for now. i have a feeling that since the fan control unit was designed for PWM, the motor itelf never really recieves full system voltage. the pwm happens so fast that the fan will run smoothly at a designed rpm. with full voltage that thing might suck the radiator right out of the car.
and just an observation, the fan has little metal balance weights on it.
thanks for the help and the offer. i'll let you know how it works out.