GM Service Manual Online
For 1990-2009 cars only

Important: Review the system description in order to familiarize yourself with the system functions. Refer to one of the following descriptions:

   •  Power Windows Circuit Description
   •  Power Door Locks Circuit Description
   •  Outside Mirrors Circuit Description

Visual/Physical Inspection

    • Inspect for aftermarket devices which could affect the operation of the Doors System. Refer to Checking Aftermarket Accessories in Wiring Systems.
    • Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

    •  Power Door Locks Inoperative - All Doors and Switches
    •  Power Door Locks - Lock Inoperative Unlock Operates
    •  Power Door Locks - Unlock Inoperative Lock Operates
    •  Power Door Locks Switch Lock Function Inoperative - One
    •  Power Door Locks Switch Unlock Function Inoperative - One
    •  Power Mirrors Inoperative
    •  Power Mirrors Inoperative - One
    •  Power Mirrors Inoperative - One
    •  Power Mirrors Inoperative in Left/Right Direction - One
    •  Power Mirrors Inoperative in Left/Right Direction - One
    •  Power Mirrors Inoperative in Up/Down Direction - One
    •  Power Mirrors Inoperative in Up/Down Direction - One
    •  Power Windows Inoperative - All
    •  Power Window Inoperative - Left Side Front
    •  Power Window Inoperative - Right Side Front from Left Front Switch
    •  Power Window Inoperative - Right Side Front
    •  Power Window Express Down Function Inoperative
    •  Power Windows Inoperative from Left Front Switch
    •  Power Windows Inoperative from Right Front Switch