Vacuum Schematic - Dual Automatic Temperature Control System
WARNING: This page is about a different car, the 2004 Mercury Mountaineer and 2004 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Vacuum Schematic - Dual Automatic Temperature Control System
Courtesy of FORD MOTOR CO.
Fig 2: Dual Automatic Temperature Control System Parts Description