Pinpoint Test F: LFC 53/DTC B1891 - Air Bag Tone Warning Indicator Circuit Short to Battery: Notes
WARNING: This page is about a different car, the 2009 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
Refer to appropriate SYSTEM WIRING DIAGRAMS , Supplemental Restraint System for schematic and connector information.