The ABS will "pump" your brakes for you. The really simple explanation is: The wheel sensors relay back to the abs computer, and computes that a wheel has stopped moving. It will activate the pump which opens and closes the brakes pretty darn fast. All 4 wheels are affected, since they are all controlled by a single pump in our cars. You will hear a noise and feel the pulsing on the peddle.
The abs pump will remain active until your car has stopped or you let off the brake. My pump assembly had a valve inside the unit freeze, which locked the right front.
I would have Ford run the codes, to be sure what is the problem. Midas (or a brake shop) may have the computer to do it as well.
Greg
