AIR BAG Warning Lamp Does Not Come On

Circuit Description
The ignition switch supplies Ignition 1 voltage to the Inflatable Restraint Sensing and Diagnostic Module (SDM) at terminal 10 using the AIR BAG Fuse The ignition switch also supplies Ignition 1 voltage to the AIR BAG warning lamp using the CLUSTER Fuse. The AIR BAG warning lamp is connected to the INFLATABLE RESTRAINT INDICATOR at terminal 7 of the SDM. When the ignition switch is first turned to the RUN position, the SDM responds by flashing the AIR BAG warning lamp seven times.

When measurements are requested in this table, use the J 39200 DMM with the correct terminal adapter from the J 35616-A Connector Test Adapter kit. When an inspection for proper connection is requested, refer to Diagrams / Testing for Electrical Intermittents. When a wire, connector or terminal repair is requested, use the J 38125-B Terminal Repair Kit.

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 power feed circuitry.
3. This step checks to see if voltage is present in the AIR BAG warning lamp circuit.
4. This step checks to see if there is a short to B+ in circuit 358.
6. This step checks to see if the instrument cluster wiring harness connector is damaged or corroded.
8. This step checks to see if the open is due to a bad bulb.
10. This step checks to see if there is an open or a high resistance in circuit 358.
13. This step checks to see if power is available to the instrument cluster power feed circuit.
15. This step checks to see if there is a short to ground in circuit 39.
19. This step checks to see if the instrument cluster wiring harness connector is damaged or corroded.
21. This step determines if there is an open or a high resistance in circuit 39 or if there is an open or a high resistance in the power feed circuit to fuse 39.