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Home >> Ford >> 1996 >> Aerostar Van Window >> Repair and Diagnosis >> External Pages >> Different car >> Section 243 (Air Bag Restraint System) >> Diagnostic Tests >> Test C - Air Bag Warning Light Stays On, Diagnostic Monitor Disconnected Or Faulty >> Possible Causes

Possible Causes

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.

Continuous illumination of AIR BAG light may be caused by a disconnected or poorly connected diagnostic monitor that is not pushing the shorting bar between terminals No. 4 and 5 into its fully retracted position. This shorts AIR BAG light circuit to ground and causes AIR BAG light to be on continuously. Continuous illumination can also be caused by a faulty diagnostic monitor or a shorted AIR BAG light circuit.

  1. Check Diagnostic Monitor Connections  - Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION  under DISABLING & ACTIVATING AIR BAG SYSTEM. Inspect diagnostic monitor connectors. Diagnostic monitor is located on left side of steering column under instrument panel. Ensure connectors are fully pushed together. Repair as necessary. If connectors are okay, go to step 2).
  2. Check AIR BAG Light Circuit  - Remove plastic locking wedge from diagnostic monitor Gray connector. Turn ignition on. If AIR BAG light is off, go to step 3). If AIR BAG light is on, locate and repair short to ground in AIR BAG warning light circuit.
  3. Inspect Shorting Bar  - Inspect shorting bars on plastic locking wedge for proper operation. Compare with another vehicle, if necessary. If shorting bar is in good working condition, replace diagnostic monitor. If shorting bar is not in good working condition, replace plastic locking wedge.
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