Liftgate Release Switch
WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
The liftgate release switch is a momentary contact switch that routes the voltage signal to ground from the BCM.
When the liftgate release switch is pressed, the BCM sends a signal to the LTM opens the liftgate. The doors must be electronically unlocked before the BCM sends the signal to the LTM.