Air Bag Warning Lamp Does Not Come On

Diagnostic Chart:

Wiring Diagram:

Circuit Description
When the ignition switch is first turned to RUN, the IGN 1 Fuse (Buick), CHIME Fuse (Oldsmobile) applies battery voltage to the AIR BAG warning lamp that is connected to SIR INDICATOR, terminal 7. The AIR BAG Fuse applies battery voltage to the IGNITION POSITIVE VOLTAGE input, terminal 10. The inflatable restraint Sensing and Diagnostic Module (SDM) responds by flashing the AIR BAG warning lamp seven times.

When measurements are requested in this table, use J 39200 Digital Multimeter with the correct terminal adapter from J 35616-A Connector Test Adapter Kit. When a check for proper connection is requested, refer to Intermittents and Poor Connections. Intermittent Problems When a wire, connector or terminal repair is requested, use J 38125-A Terminal Repair Kit and refer to Wiring Repair.

Test Description
The numbers below refer to the step numbers on the diagnostic table:
2. This test determines whether the malfunction is in the inflatable restraint Sensing and Diagnostic Module (SDM) circuitry or in the instrument cluster (Buick), remote indicator bank (Oldsmobile) power teed circuitry.
3. This test determines whether voltage is present in the warning lamp circuit.
4. This test isolates CKT 358 and checks for a short in CKT 358 to B+.
6. This test determines if the malfunction is in the instrument cluster (Buick), remote indicator bank (Oldsmobile) connector.
8. This test determines if the open is due to a bad bulb.
10. This test isolates an open in the warning lamp circuitry.
13. This test checks whether power is available to the instrument cluster (Buick), remote indicator bank (Oldsmobile) power feed circuit.
14. This test checks for a short from the instrument cluster (Buick), remote indicator bank (Oldsmobile) power feed circuit to ground.
15. This test determines whether the short-to-ground is due to a short in the wiring or internal to the instrument cluster (Buick), remote indicator bank (Oldsmobile).
19. This test determines if the malfunction is in the instrument cluster (Buick), remote indicator bank (Oldsmobile) connector.
21. This test determines whether the malfunction is due to an open power feed circuit from the IGN 1 Fuse (Buick), CHIME Fuse (Oldsmobile).