Lock Out Switch Operation
WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
The left front window switch contains a lock out switch. The lock out switch creates an open in the wire leading to ground to the other window switches. This action prevents the operation of the windows from their individual switches. You may only then operate the left front window from the master switch.