Pinpoint Test B: The Power Liftgate is Inoperative From an Individual Switch: Notes
WARNING: This page is about a different car, the 2009 Mercury Sable, 2009 Ford Taurus X, and 2009 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
Refer to appropriate SYSTEM WIRING DIAGRAMS article, Power Liftgate/Retractable Running Board for schematic and connector information.