1987 Pontiac Safari

THE WINDSHIELD WIPER CONTROLS TURN ON AND WORK FINE AT ALL SPEEDS. HOWEVER, WHEN YOU TRY TO TURN THE WIPERS OFF, (TURN THE WIPER CONTROLL TO THE "OFF" POSITION, YOU CANNOT DO SO UNLESS YOU STOP THE CAR AND TURN OFF THE ENGINE. THEREFORE ONCE YOU TURN THEM ON AND THEN IT STOPS RAINING, YOU CANNOT TURN OFF THE WIPERS BY JUST SETTING THE WIPER CONTROL TO "OFF". YOU MUST INSTEAD SET THE CONTROL TO "OFF" STOP THE CAR, AND THEN TURN OFF THE ENGINE COMPLETELY. WHEN YOU START THE CAR AGAIN, THE WIPERS WILL BE STOPPED UNTIL THE NEXT TIME YOU USE THEM, AND THEN YOU HAVE TO GO THROUGH THE SAME PROCEDURE AGAIN. I TOOK THE CAR INTO OUR LOCAL MECHANIC AND HE IS THE ONE WHO THINKS IT IS IN THE RELAY BOX AND NOT THE MOTOR. HE THINKS IT IS NOT MAKING A GOOD CONTACT SOMEWHERE AND THAT IS WHAT'S CAUSING THE PROBLEM. HE DID NOT KNOW ENOUGH ABOUT THE SYSTEM SO HE WAS HESITANT TO TRY AND FIX IT. I THEN CALLED EVERHART O'LEARY MOTORS, BUT THEY WANT TO CHARGE $32.00 JUST TO LOOK AT IT, AND ARE GUESSING THAT IT MIGHT COST APPROXIMATELY $150. TO FIX THE PROBLEM. I DON'T RECALL EXACTLY WHEN THE PROBLEM STARTED (I ONLY GUESSED AT THE DATE), BUT IT SEEMS TO BE A DEFECT IN THE SYSTEM WHICH THE MANUFACTURER SHOULD ADDRESS. YOUR HELP WOULD BE APPRECIATED.