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Home >> Chevrolet >> 1990 >> Step Van 7.4 N, Standard >> Repair and Diagnosis >> Electrical >> Gauges >> Instrument Panel - Standard & Electronic >> Testing >> Oil Pressure Gauge Testing - Astro, Safari, C, K, S & T Series >> Gauge Reads "0" When Engine Running

Gauge Reads "0" When Engine Running

  1. Check oil level and add if necessary. Test oil pressure with manual gauge and adapter. If oil pressure reading is good on manual gauge tester, check for grounded gauge circuit by disconnecting lead at sending unit.
  2. Turn ignition on. Oil pressure gauge should now read 80. If gauge stays at 0, disconnect lead from gauge. Gauge should now read 80. If this happens, find short to ground between gauge and sending unit. If gauge still reads 0, replace gauge and test oil pressure gauge sending unit resistance. See OIL PRESSURE GAUGE SENDING UNIT RESISTANCE  table. Replace sending unit if it reads one ohm with engine running.
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