Oil Pressure Gauge
- Remove sender and connect a mechanical oil pressure gauge. If pressure at engine is correct, test gauge and IVR as follows. Connect a test lamp or voltmeter to sending unit lead. With ignition on, a flashing light or pulsating voltage reading should be present.
- If pulsating voltage is shown but gauge reads incorrectly, perform calibration test. If constant voltage is present, replace IVR. If no voltage is present, check wiring for open circuits.