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Home >> GMC >> 2002 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control System >> Diagnostic Information & Procedures >> Power Mode Mismatch >> Test Description

Test Description

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

  1. 4)  - This step tests for battery voltage on the signal circuits that are not required.
  2. 5)  - This step tests for no battery voltage on the required signal circuits.
  3. 6)  - If any ignition switch parameters that should be inactive in the present ignition switch position are active, 2 ignition switch signal circuits may be shorted together.
  4. 7)  - This step eliminates open circuits as the cause of the malfunction.
  5. Fig 1: Power Mode Mismatch Diagnosis (Steps 1-3)
    G01713639Courtesy of GENERAL MOTORS CORP.
    Fig 2: Power Mode Mismatch Diagnosis (Steps 4-11)
    G01713640Courtesy of GENERAL MOTORS CORP.
    Fig 3: Power Mode Mismatch Diagnosis (Step 12)
    G01713641Courtesy of GENERAL MOTORS CORP.