Oil Pressure Gauge
- Remove oil pressure sender unit and temporarily attach a mechanical oil pressure gauge in its place.
- Operate engine to determine oil pressure. If engine oil pressure is normal, instrument cluster gauge should also indicate normal pressure.
- To test oil pressure gauge and IVR proceed as follows: Disconnect gauge lead from terminal at sender unit. Connect other test lead to a good ground. With ignition on, a flashing light or fluctuating voltmeter indicates IVR is operating properly and gauge circuit is not interrupted.
Courtesy of FORD MOTOR CO.
- If pulsating voltage is shown but gauge is not accurate, replace gauge. If light stays on or voltage reading is steady, replace IVR.
- If no voltage is indicated by voltmeter or test light, check for an open circuit in IVR, gauge windings, or printed circuit. Do not spark or ground either terminal of IVR.