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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 859 (Rear Axle Controls) >> Diagnostic Information and Procedures >> Differential Lock Inoperative >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

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

  1. 3. This step tests the ignition 1 voltage circuit for proper voltage.
  2. 4. This step tests the ground circuit for an open.
  3. 5. This step tests the axle actuator control circuit duty cycle.
  4. 6. This step tests the axle actuator control circuit for an open or short.
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