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 supplied by the Fuel Pump Switch/Oil Pressure Switch. It is closed when the oil pressure is below 13.8 kPa (2 psi). After the engine starts and normal oil pressure builds up, the Fuel Pump Switch/Oil Pressure Switch opens. The Oil Pressure Indicator goes out.