Exterior Liftgate Release Switch
WARNING: This page is about a different car, the 2023 Lincoln Nautilus. However, it is still accessible from the selected car via links, so may be relevant.
The exterior liftgate release switch is a momentary contact switch that supplies a ground signal to the BCM and (if equipped) the RGTM. When the exterior liftgate release switch is pressed, the signal is routed to ground indicating a request to the BCM and the RGTM to release the liftgate latch or power open the liftgate.