Yes, it's called a lamp fault code.
9 is not familiar to me. Call dealer service department and ask them what code means.
Here are codes for a 94 Aerostar. I don't have 91 Sable. Sorry.
Air Bag Diagnostic Monitor Diagnostic Trouble Code Priority Table
Diagnostic Trouble Code
Component/Fault Description
—
No Air Bag Indicator — Inoperative Indicator Circuit or No Battery Positive Voltage to Air Bag Diagnostic Monitor
—
Continuous Air Bag Indicator — Air Bag Diagnostic Monitor Disconnected or Inoperative
12
Low Battery Voltage
13
Air Bag Module or RH Cowl Side Panel Air Bag Sensor Circuit Shorted to Ground
21
LH Cowl Side Panel Air Bag Sensor Not Mounted to Vehicle Properly
22
LH Cowl Side Panel Air Bag Sensor Circuit Shorted to Battery Voltage
23
LH Cowl Side Panel Air Bag Sensor Circuit Input Feed/Return Circuit Open
24
LH Cowl Side Panel Air Bag Sensor Diagnostic Circuit Open or Low Resistance in Center Air Bag or Front Air Bag
32
Driver Side Air Bag Circuit High Resistance or Open
33
Passenger Side Air Bag Circuit High Resistance or Open
34
Driver Side Air Bag Circuit Low Resistance or Shorted
35
Passenger Side Air Bag Circuit Low Resistance or Shorted
41
Center Radiator and RH Cowl Side Panel Air Bag Sensor Circuits High Resistance or Open
44
RH Cowl Side Panel Air Bag Sensor Not Mounted to Vehicle Properly
45
Center Air Bag Sensor Not Mounted to Vehicle Properly
46
Open Splice Center Air Bag Sensor Ground Monitor
51
Air Bag Diagnostic Monitor Internal Thermal Fuse Blown and Short to Ground No Longer Exists
52
Backup Power Supply Voltage Boost Fault
53
Sensor Circuits Resistance to Ground or Internal Air Bag Diagnostic Monitor Fault
—
Rapid Continuous Flashing of Air Bag Indicator