Courtesy Lamps
WARNING: This page is about a different car, the 2009 Ford Flex. However, it is still accessible from the selected car via links, so may be relevant.
The courtesy lamps are controlled by the SJB . The courtesy lamp subsystem consists of the ajar switches, interior lamps, instrument panel dimmer switch, LTM (if equipped), and the puddle lamps. The SJB supplies voltage to the courtesy lamps when the SJB receives the required input.