TL*THE CONTACT OWNS A 2001 FORD WINDSTAR. WHILE DRIVING 5 MPH, THE CONTACT NOTICED SMOKE UNDERNEATH THE HOOD. HE PULLED TO THE SIDE OF THE ROAD AND TURNED OFF THE VEHICLE. THE SMOKE FLOW GRADUALLY LESSENED AND BECAME CONTROLLED. HE CALLED ROADSIDE ASSISTANCE AND THEY UNPLUGGED THE MASTER CYLINDER SWITCH, WHICH SEEMED TO BE THE CAUSE OF THE FAILURE. THE VEHICLE HAS NOT BEEN DIAGNOSED BY THE DEALER. THE MANUFACTURER STATED THAT THERE WERE NO RECALLS PERTAINING TO THIS FAILURE. THE CURRENT AND FAILURE MILEAGES WERE APPROXIMATELY 91,000.