Oil Pressure Indicator

The OIL Pressure Indicator comes on to warn the driver when the engine oil pressure is low. Battery voltage is applied to one side of the bulb. A ground path is provided by the Fuel Pump/Oil Pressure Switch/Sender. It closes when the oil pressure is below 27 kPa (4 psi) and the Indicator bulb lights. After the engine starts and normal oil pressure builds up, the Fuel Pump/Oil Pressure Switch/Sender opens. The OIL Pressure Indicator goes out.