Park Ave. ABS control Module

I am having problems with my traction control and anti-lock brakes activating on dry payment. I took it to a repair shop and they told me that all the wheel sensors are saying that they are spinning 20 miles an hours faster then the car is actually going.

They told me that the ABS control module is defective and needs replacing. This is where all the brake lines go to that monitors everything. Does this sound like the problem? If so, How difficult is it to change out myself.
Thanks,
Phil

Actually, I believe that the ABS contol module on my 1993 PA Ultra is down next to the gas pedal, and just to the right. Kind of tucked back under the floor air vent.