Oil Pressure Gauge Simple Test

Engine Coolant Temperature Gauge Simple Inspection:

1. Disconnect the wiring connector from the oil pressure gauge unit inside the engine compartment.
2. Ground the connector at the harness through a test light.
3. Turn the ignition key to the ON position.
4. Check to be sure that the test light flashes or lights steadily and the oil pressure gauge operates.
5. If both the test light and gauge operate, the circuit to the gauge unit is normal and the gauge unit itself is faulty. If the test light flashes or lights steadily but the gauge does not operate, the gauge is faulty.
If neither the test light nor the gauge operates, the oil pressure gauge circuit is faulty.