OEM NO: 1116647、1226188、1363512、 1S7A-9278-A、3M51 9278 AB、3M51- 9278-AA、3M51-9278-AB 

Details: Oil Pressure Switch is consisted of a diaphragm and a slip line potentiometer, when the oil pressure changes, the diaphragm then moves, which will drive the potentiometer slide down, thus changes its resistance. 

When the potentiometer resistance changes, the oil pressure indicator of current changes as well, thus promote the pointer points out the oil pressure value