Ford Crown Victoria, Mercury Grand Marquis, Marauder, Lincoln Town Car 1999-2005

General Information


Some vehicles are equipped with an air bag system. The system must be disarmed before performing service on, or around, system components, the steering column, instrument panel components, wiring and sensors. Failure to follow the safety precautions and the disarming procedure could result in accidental air bag deployment, possible injury and unnecessary system repairs.

The supplemental restraint system was designed to provide increased protection in case of an accident for those in the front seat of the car, when used along with the safety belt system. The system MUST be disarmed before any work is performed on or around the supplemental air bag system.

The system is an electronically controlled, mechanically operated system. The system contains two basic subsystems: the driver's side air bag module assembly and the passenger side air bag assembly, and the electrical system that connects them. The system consists of:

The crash sensors
The safing sensor
The air bag module(s)
The diagnostic monitor
The back-up power supply
The instrument cluster indicator
The sliding contacts (clock spring assembly)

The system is operates as follows: The system remains out of sight until activated in an accident that is determined to be the equivalent of hitting a parked car of the same size and weight at 28 mph (40 km/h) with the vehicle receiving severe front end damage. This determination is made by crash and safing sensors mounted on the vehicle which when a sufficient impact occurs, close their contacts completing the electrical circuit and inflating the air bags. When not activated the system is monitored by the air bag diagnostic monitor and system readiness is indicated by the lamp located on the instrument cluster. Any fault detected by the diagnostic monitor will illuminate the lamp and store a Diagnostic Trouble Code (DTC).

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Fig. Air bag system component locations-1990-91 vehicles

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Fig. Air bag system component locations-1992-00 vehicles