F 350 4WD Pickup V8-351 5.8L VIN H EFI (1997)
Oil Pressure Gauge: Testing and Inspection
Dash Gauge Test
Check gauge operation as follows:
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With the key in RUN and the engine off, disconnect wiring connector at the switch. The gauge should indicate on the LOW graduation or below.
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Connect the wiring connector to the engine block ground. The gauge should indicate just slightly above mid-scale.
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If the oil pressure gauge tests within calibration, replace oil pressure switch.
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If the gauge still tests out of calibration, replace oil pressure gauge.
