Rear Exterior Tailgate Release Switch
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
The rear exterior tailgate release switch (located on the top of the tailgate release handle) is a momentary contact switch that routes the voltage signal from the RGTM to ground when pressed. Pressing this switch either opens or closes the power tailgate.