Exterior Liftgate/Luggage Compartment Lid Release Switch
WARNING: This page is about a different car, the 2018 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.
The exterior liftgate/luggage compartment lid release switch is a momentary contact switch that receives a voltage signal from the BCM on the input circuit. When the button is pressed, the input circuit is routed to ground, signaling the BCM to release the liftgate/luggage compartment lid latch. The release switch only operates when the doors are unlocked electronically.