QUOTE (SHOZ123 @ Apr 15 2009, 12:48 AM)
Air Bag Diagnostic Codes
On the '89-91 systems, you simply count the flashes from the Airbag lamp to get the fault code.
Code Component Fault/Description
2 All Primary Crash Sensors Disconnected.
3 Air Bag Deployment Circuit - Low Battery Voltage or Low Backup Power Supply Voltage
4 Safing Sensor - Diagnostic Circuit Open or Low Primary Crash Sensor Resistance
5 Air Bag Circuit or Crash Sensor Circuit - Shorted to Ground
6 Driver-Side Air Bag Circuit - Open or High Resistance
7 Passenger-Side Air Bag Circuit - Open or High Resistance
8 Primary Crash Sensor - Not Mounted to Vehicle Properly
9 Primary Crash Sensor Circuit - Open or High Resistance
10 Diagnostic Monitor Internal Thermal Fuse - Open Due to Intermittent Short to Ground
In the 1992 model year the systems changed. 1992 System 2 was used in the Taurus/Sable, Town Car (built after 11/5/91), and Continental. To obtain the code on this system, count two sets of flashes and interpret it as a 2-digit code (e.g., flash-flash pause flash-flash-flash = 23)[/b]
I went through the whole air bag deal a number of years ago with my 90.
To be safe, disconnect the battery for an hour or so before working on the air bag
systems. The airbag diagnostic module is behind the glove box in a blue plastic
module. The main front crash sensor is above the radiator. there are side sensors
in the wheel wells. they are a small module with arrows for direction on them.
If your lucky, its a bad ground on the sensor. take the sensor off, clean the ground
off under it, check the connector and re install it. You could also pull the sensors
off a junk car and swap them out. As i recall, the sensor above the radiator
(and under the plastic cover) has four bolts to hold it to the radiator support.
Be careful in what your doing. Airbags can be dangerous.