Circuit/System Description
WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
The outside mirror switch and passenger window switch control the fold/unfold motors through bi-directional control circuits, voltage is sent to the commanded mirror via a mirror control circuit. The opposite mirror control circuit acts as a ground circuit for the bi-directional mirror motor. Ground is applied through the switch, The outside rearview mirror switch will also send a serial data message to the seat memory control module requesting the mirror fold/unfold command, the seat memory control module will then send the command to the passenger window switch which will also command the passenger mirror to fold or unfold.