Liftgate Ajar Switch
WARNING: This page is about a different car, the 2013 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
The liftgate ajar switch receives a 12-volt signal from the BCM on an independent circuit. When the liftgate is closed, the liftgate ajar switch is closed, routing the signal to ground. When the liftgate is opened, the liftgate ajar switch opens, interrupting the signal. The BCM interprets this as an open liftgate.
The liftgate ajar switch is part of the liftgate latch and not serviceable separately.