Full Open Switch: Operation
WARNING: This page is about a different car, the 2004 Chrysler Pacifica. However, it is still accessible from the selected car via links, so may be relevant.
When the power liftgate is approaching the full open position, the full open switch's contact arm leaves contact with the moving rack assembly. This releases the switch and opens the circuit supplied to the power liftgate control module. This signals the module that the liftgate is reaching the full open position. The full open switch is a normally closed circuit micro-switch.