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Home >> GMC >> 1985 >> Jimmy 6.2 C >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel - Except "S" Series >> Testing >> Oil Pressure Gauge

Oil Pressure Gauge

  1. Disconnect oil gauge sender wire and connect gauge tester to sender wire and ground. Turn ignition on. If gauge responds to tester accurately, replace sender. If gauge does not respond, go to step 2). If gauge responds but not accurately, go to step 4).
  2. Disconnect oil gauge lead at engine harness connector. Connect tester to lead that goes to gauge. If gauge responds to tester accurately, check wiring between sender connector and engine harness connector. If gauge does not respond, go to step 3).
  3. Remove gauge. Check for bad connections at gauge terminals or instrument cluster connector. If connections are good, replace gauge. If bad, repair connections and install gauge.
  4. Remove gauge and check for loose nuts at gauge terminals. If nuts are loose and gauge reads slightly below midscale with 90 ohms from tester, tighten nuts and install gauge. If gauge is inaccurate in other ways and/or nuts are tight, replace gauge.
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