Circuit/System Description
WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
When the ignition switch is in the ON position or when retained accessory power (RAP) is active, voltage is applied to the sunroof control module via the RAP relay and the SUNROOF fuse. The sunroof control module determines the sunroof motor direction based on inputs received from the sunroof switch. The sunroof control module supplies each of the sunroof switch signal circuits with a 12 V reference. When the switch is pressed the signal circuit is pulled low signaling the roof open or close request. The sunroof control module controls the sunroof motor direction by changing the polarity of the applied voltage.