Test Description

WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. 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 (1 Of 2)
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Fig 2: Power Mode Mismatch (2 Of 2)
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Fig 3: Control Module References (1 Of 2)
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Fig 4: Control Module References (2 Of 2)
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