1993 DODGE RAM VAN Equipmentelectrical Problems

EVERY YEAR SINCE OCT. 2000 (BOUGHT THE VAN IN MARCH 2000) WHEN WE USE THE AC THE CHECK GUAGES LIGHT COMES ON, THE OIL PRESSURE DROPS AND THE ENGINE MAKES A TAPPING NOISE. IN OCT. OF 2000 WE WERE TOLD IT WAS THE PCM AND THEY REPLACED THAT ALONG WITH AN AC MODULE. TWICE THE DEALERSHIP HAS HAD TO REPLACE THE SENDING UNIT AND OIL PRESSURE SWITCH (ONCE IN 2000 AND AGAIN ON JUNE 9, 2003). TWICE THE VEHICLE WAS IN FOR THIS SAME PROBLEM AND THE DEALER COULD NOT DUPLICATE THE PROBLEM. IN JUNE OF 2002 THIS SAME PROBLEM OCCURRED AGAIN WE HAD TO REPLACE AN OUTPUT SPEED SENSOR. I WAS TOLD ONE OF THE SERVICEMEN AT SCHAEFER & STROMINGHER(JUNE 11, 2003) THAT IF I HAD THE OPPORTUNITY I SHOULD LOOK INTO ANOTHER VEHICLE (BETWEEN HIM, ME AND THE LAMPPOST). I CANNOT AFFORD TO BUY ANOTHER VEHICLE. HE HAD...