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Oil Pressure Gauge & Harness Operational Test

  1. Unplug oil sending unit connector on engine. Turn ignition on. Oil gauge should indicate LOW. Turn ignition off. Connect a 12-volt, 3.4-watt test light between oil sending unit harness connector terminal and ground.
  2. Turn ignition on. Test light should glow and oil pressure gauge should slowly move to HIGH. If gauge functions as described, perform SENDING UNIT OPERATIONAL TEST below. If gauge does not function as described, perform OIL PRESSURE GAUGE RESISTANCE TEST below.
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