Test Description

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 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.

6. This step tests for battery voltage on the signal circuits that are not required.

7. This step tests for no battery voltage on the required signal circuits.

8. 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.

9. This step eliminates open circuits as the cause of the malfunction.

Fig 1: Power Mode Mismatch (Steps 1-4)

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Fig 2: Power Mode Mismatch (Steps 5-12)

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Fig 3: Power Mode Mismatch (Steps 13-14)

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