Back-Up Power Supply
WARNING: This page is about a different car, the 1995 Ford Pickup, 1995 Ford F-Super Duty, 1995 Ford Cab & Chassis, and 1995 Ford Bronco. However, it is still accessible from the selected car via links, so may be relevant.
A back-up power supply is used on all models and is located inside the diagnostic monitor. If battery or battery cables are damaged in an accident before impact sensors close the circuit, back-up power supply will deploy air bag. Back-up power supply will hold a deployment charge for approximately one minute after positive battery cable is disconnected.