Regal V6-191 3.1L VIN M SFI (1995)
Oil Pressure Switch (For Fuel Pump): Description and Operation
As a backup system to the fuel pump relay, the fuel pump also can be turned "ON" by the fuel pump and engine oil pressure switch. The switch has two
internal circuits. One operates the oil pressure indicator or gauge in the instrument cluster and the other is a normally open switch which closes when oil
pressure reaches about 28 kPa (4 psi). If the fuel pump relay fails, the fuel pump and engine oil pressure switch runs the fuel pump.
