COMING TO A STOP AT A STOP SIGN, WARNING MESSAGES APPEARED - POWER STEERING ASSIST FAILURE AND ADVANCE TRAC CONTROL FAULT. THE VEHICLE LOST ALL POWER STEERING ASSIST. WITH MUCH EFFORT (EXTREMELY HARD TO STEER!), I PULLED THE VEHICLE TO A PARKING SPACE TO DIAGNOSE THE PROBLEM. THE ADVANCE TRAC WARNING MESSAGE STAYED ON. THE TRACTION CONTROL LIGHT AND THE TRACTION CONTROL 'OFF" LIGHT ALSO STAYED ILLUMINATED. I TURNED THE EXPLORER OFF. WHEN I RESTARTED, THE POWER STEERING RETURNED AND AFTER A FEW SECONDS THE ADVANCE TRAC WARNING MESSAGE WENT OFF. TOOK VEHICLE TO FORD DEALER (ALAN VIGIL FORD) THE NEXT MORNING. THEY TOLD ME I NEEDED A NEW STEERING RACK. PARTS WILL NOT BE IN FOR SEVERAL DAYS. THEY TOLD ME I COULD DRIVE THE VEHICLE UNTIL THE PARTS ARRIVE. I'LL BRING IT BACK TO THEM THEN. *TR