Power Liftgate Control Switch - Instrument Panel
WARNING: This page is about a different car, the 2008 Mercury Sable, 2008 Ford Taurus X, and 2008 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
Pressing the instrument panel power liftgate control switch supplies a momentary ground signal to the LTM which will open or close the liftgate depending on the conditions.