Air Bag Warning Indicator
WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
The air bag warning indicator is used to provide a status of the supplemental restraint system. The instrument cluster (IC) receives a ground signal from the restraints control module (RCM) through hardwired circuitry. If an air bag system concern is detected, a DTC is logged and the RCM removes the ground to the instrument cluster (IC) to illuminate the air bag warning indicator.