Circuit/System Description
WARNING: This page is about a different car, the 2008 Pontiac Torrent and 2008 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
The liftgate switch is an input to the body control module (BCM). The BCM supplies battery voltage to the signal circuit and when the liftgate switch is activated the signal circuit voltage goes low. The BCM controls the liftgate release actuator assembly through the LIFTGATE relay. When the liftgate switch signal is activated, the BCM enables the LIFTGATE relay by applying battery voltage to the liftgate relay circuit and the relay is energized when the BCM grounds the LIFTGATE relay control circuit. When the relay is energized battery voltage is supplied to the liftgate release actuator assembly through the liftgate release actuator control circuit.