Courtesy Lamps
WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
The courtesy lamp subsystem consists of the interior dome lamps, the instrument panel dimmer switch, the overhead console lamps, scuff plate lamps (if equipped) and the puddle lamps (if equipped). The SJB supplies voltage to the courtesy lamps when the SJB receives the required input.