Test Description

WARNING: This page is about a different car, the 2002 GMC Safari and 2002 Chevrolet Astro. 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 Diagnosis (Steps 1-6)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Power Mode Mismatch Diagnosis (Steps 7-14)

Courtesy of GENERAL MOTORS CORP.