Test Description

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. 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.

4) - This step tests for battery voltage on the signal circuits that are not required.
5) - This step tests for no battery voltage on the required signal circuits.
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.
7) - This step eliminates open circuits as the cause of the malfunction.

Fig 1: Power Mode Mismatch Diagnosis (Steps 1-3)

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Fig 2: Power Mode Mismatch Diagnosis (Steps 4-11)

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Fig 3: Power Mode Mismatch Diagnosis (Step 12)

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