Oil Pressure Indicator

The OIL PRESSURE indicator goes on to warn low oil pressure when the oil pressure switch is closed. The oil pressure switch closes when the oil pressure falls below 27 kPa (4 psi). when the Engine is initially cranked, oil pressure is below 27 kPa (4 psi), so the oil pressure switch closes, and the OIL PRESSURE indicator goes on momentarily as a bulb test. The oil pressure switch opens as soon as the oil pressure is above 27 kPa (4 psi) and the OIL PRESSURE indicator goes off.