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Home >> Geo >> 1990 >> Prizm Base, 4D Hatchback, Automatic >> Repair and Diagnosis >> Electrical >> Gauges >> Instrument Panel >> Testing >> Testing Oil Pressure Light & Switch >> Switch Check

Switch Check

Disconnect oil pressure switch wire connector. See OIL PRESSURE SWITCH LOCATION table. Using ohmmeter, measure resistance between switch terminal and ground. Continuity should exist with engine stopped. No continuity should be present when there is oil pressure (engine running). Replace as required.

OIL PRESSURE SWITCH LOCATION

Model Location
Prizm Located on Left Front of Engine, Above Oil Filter