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Test Description

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The numbers below refer to the step numbers on the diagnostic table.

  1. 2. Tests for an intermittent condition.
  2. 3. Determines whether the failure is the result of a faulty front axle circuit or the instrument cluster.
  3. 4. Tests for proper signal voltage to the PCM.
  4. 5. Tests for proper ignition 1 voltage to the instrument cluster.
Fig 1: 4WD Indicator Inoperative
G01481206Courtesy of GENERAL MOTORS CORP.
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