WARNING: This page is about a different car, the 2003 Dodge Intrepid, 2003 Chrysler Intrepid, 2003 Chrysler Concorde, and 2003 Chrysler 300M. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: All Doors Failing To Lock From Any Switch - Diagnostic Procedure (1 Of 2)
Courtesy of DAIMLERCHRYSLER CORP.
Fig 2: All Doors Failing To Lock From Any Switch - Diagnostic Procedure (2 Of 2)