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Home >> Ford >> 2000 >> Expedition 5.4 L, RWD >> Repair and Diagnosis >> Electrical >> Gauges >> Instrument Panels - Analog - Expedition, F150/F250 Light-Duty Pickups & Navigator >> System Tests >> Test E: Oil Pressure Gauge Inaccurate

Test E: Oil Pressure Gauge Inaccurate

  1. Turn ignition switch to OFF position. Disconnect engine oil pressure switch connector. Turn ignition switch to RUN position. Connect 5-amp fused jumper wire between engine oil pressure switch connector and ground. Oil pressure gauge should indicate normal oil pressure with jumper wire connected and no oil pressure with jumper wire disconnected. If oil pressure gauge is as specified, replace engine oil pressure switch. If oil pressure gauge is not as specified, go to next step.
  2. Turn ignition switch to OFF position. Disconnect instrument cluster 20-pin connector. Measure resistance of White/Red wire between engine oil pressure switch connector and instrument panel 20-pin connector terminal No. 20. Measure resistance of White/Red wire between instrument panel 20-pin connector terminal No. 20 and ground. See Figure. Resistance should be less than 5 ohms between instrument cluster connector and oil pressure switch connector, and more than 10 k/ohms between instrument cluster connector and ground. If resistance is as specified, go to next step. If either resistance is not as specified, repair open or short to ground in White/Red wire.
  3. Disconnect all instrument cluster connectors. Inspect connectors for corrosion and pushed out pins. Connect all instrument cluster connectors, ensuring they are connected correctly. Operate system and verify if concern is still present. If concern is still present, replace instrument cluster. See INSTRUMENT CLUSTER  under REMOVAL & INSTALLATION. If concern is not present, system is operating correctly at this time. Clear DTCs and repeat self-test.
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