Left Mirror Does Not Operate In Left/Right Positions
WARNING: This page is about a different car, the 1998 Cadillac Eldorado. However, it is still accessible from the selected car via links, so may be relevant.
Check for open in White wire between power mirror switch connector terminal "D" and left power mirror connector terminal "B". Check for open in Light Blue wire between left power mirror connector terminal "A" and splice S506 (located in left front door harness). Repair as necessary. If circuits are okay, replace left power mirror.