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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 833 (Transfer Case - NVG 236/246-NP8) >> Diagnostic Information and Procedures >> Front Axle Will Not Disengage >> Test Description

Test Description

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

  1. This step tests the electrical function of the front axle actuator and helps determine mechanical and electrical malfunctions.
  2. This step tests for proper voltage and ground at the front axle actuator.
  3. This step tests the operation of the front axle actuator control circuit.
  4. This step tests the electrical function of the front axle actuator control circuit.
  5. This step tests for proper supply voltage to the front axle actuator.
  6. This step tests for open fuse in the ignition 3 voltage circuit.
  7. This step tests the front axle actuator control circuit for an open or high resistance.
  8. This step tests the front axle actuator signal circuit for an open or high resistance.
  9. This step helps determine if the front axle actuator has a mechanical malfunction.
  10. This step tests the front axle switch circuit for a short to voltage.
  11. This step inspects the front axle for a mechanical malfunction.
    Fig 1: Diagnostic System Check - Front Axle Will Not Disengage (Step 1-3)
    G01456586Courtesy of GENERAL MOTORS CORP.
    Fig 2: Diagnostic System Check - Front Axle Will Not Disengage (Step 4-17)
    G01456587Courtesy of GENERAL MOTORS CORP.

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