Guys keep in mind the motors fail, but the control module fails much more often. If you remove the motor plugs from the control unit harness (pop off the vts cover, the green and blue wires) and attach them to a battery, it should move in one direction. If you reverse the wires, it should move the other direction. (be careful not to exceed the movement limit of the mechanism- remove the motor if youre unsure- its only 4 nuts.)
With that said, you may just need a new module- they are pricey, but once you know what has actually failed then contact Nick (minnetonka4me) or any of the other parts guys on the forum for a good used unit.
Obviously if the motor doesnt spin, then you need a motor- but the questionable control module is still.... questionable.