AIR BAG Warning Lamp Does Not Come On

Circuit Description
When the ignition switch is first turned to RUN, the IPC/BFC Fuse applies battery voltage to the AIR BAG warning lamp that is connected to Inflatable Restraint indicator, terminal 7. The air bag fuse applies battery voltage to the IGNITION 1 input, terminal 10. The Inflatable Restraint Sensing and Diagnostic Module (SDM) responds by flashing the AIR BAG warning lamp 7 times.

Test Description
The numbers below refer to the step numbers on the diagnostic table:
2. This determines whether the malfunction is in the Inflatable Restraint Sensing and Diagnostic Module (SDM) circuitry or in the instrument cluster power feed circuitry.
3. This determines whether voltage is present in the warning lamp circuit.
4. This isolates CKT 358 and checks for a short in CKT 358 to B+.
6. This determines if the malfunction is in the instrument cluster connector.
8. This determines if the open is due to a bad LED.
11. This tests whether power is available to the instrument cluster power feed circuit.
12. This tests for a short from the instrument cluster power feed circuit to ground.
13. This determines whether the short to ground is due to a short in the wiring or internal to the instrument cluster.
17. This determines if the malfunction is in the instrument cluster connector.
19. This determines whether the malfunction is due to an open power feed circuit from the IPC/BFC Fuse.