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No Response Air Bag Control Module

WARNING: This page is about a different car, the 1999 Dodge Pickup and 1999 Dodge Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: For connector terminal identification and wiring diagrams, see BODY CONTROL COMPUTER - INTRODUCTION article. Perform VERIFICATION TEST VER-1  after each repair.
CAUTION: Always turn ignition off prior to disconnecting any module connector.
  1. Remove and inspect fuse No. 19 from junction block. Junction block is on left side of instrument panel. If fuse is open, go to next step. If fuse is okay, go to next step  6 .
  2. Using external voltmeter, measure voltage between ground and voltage input side of fuse No. 19 socket. If voltage is 10 volts or less, repair open ignition switch output circuit (Dark Blue wire between ignition switch and junction block). If voltage is more than 10 volts, go to next step.
  3. Turn ignition off and wait 2 minutes. Using external ohmmeter, measure resistance between ground and fused ignition switch output run/start terminal (Light Green/Yellow wire) on fuse No. 19 socket. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, go to step  5 .
  4. Disconnect Air Bag Control Module (ACM) connector. ACM is located under center of instrument panel. Turn ignition on. Measure resistance between ground and fused ignition switch output run/start terminal (Light Green/Yellow wire) on fuse No. 19 socket. If resistance is less than 5 ohms, repair Light Green/Yellow wire for short to ground. Replace fuse No. 19. If resistance is 5 ohms or more, replace air bag control module and fuse No. 19.
  5. Turn ignition off and wait 2 minutes. Disconnect Air Bag Control Module (ACM) connector. ACM is located under center of instrument panel. Using external ohmmeter, measure resistance of Light Green/Yellow wire between ACM connector terminal No. 14 and fused ignition switch output run/start terminal on fuse No. 19 socket. If resistance is less than 5 ohms, connect ACM connector. Turn ignition on. Replace fuse No. 19 in junction block. Go to appropriate lemon-25(R) AIR BAG SERVICE & REPAIR, DOMESTIC CARS, LIGHT TRUCKS & VANS for further testing. If resistance is 5 ohms or more, repair open Light Green/Yellow wire. Replace fuse No. 19.
  6. Using external voltmeter, measure voltage between ground and voltage input side of fuse No. 19 socket. If voltage is 10 volts or less, repair open ignition switch output circuit (Dark Blue wire between ignition switch and junction block). If voltage is more than 10 volts, go to next step.
  7. Turn ignition off and wait 2 minutes. Install fuse No. 19. Disconnect Air Bag Control Module (ACM) connector. ACM is located under center of instrument panel. Turn ignition on. Using external voltmeter, measure voltage between ground and ACM connector terminal No. 14 (Light Green/Yellow wire). If voltage is 10 volts or less, repair open Light Green/Yellow wire. If voltage is more than 10 volts, go to next step.
  8. Turn ignition off. Using external ohmmeter, measure resistance between ground and ACM connector terminal No. 4 (Black/Pink). If resistance is 5 ohms or more, repair open Black/Pink wire. If resistance is less than 5 ohms, go to next step.
  9. Turn ignition on. Using external voltmeter, measure voltage between ground and ACM connector terminal No. 21 (Violet/Brown wire). If voltage is not 1.8-2.6 volts, repair open Violet/Brown wire. If voltage is 1.8-2.6 volts, go to next step.
  10. Turn ignition off. Using external ohmmeter, measure resistance between ground and ACM connector terminal No. 4 (Black/Pink wire). If resistance is 5 ohms or more, repair open Black/Pink wire. If resistance is less than 5 ohms, go to next step.
  11. Using external voltmeter, measure voltage between ground and ACM connector terminal No. 22 (White/Black wire). If voltage is not 1.8-2.6 volts, repair open White/Black wire. If voltage is 1.8-2.6 volts, replace ACM.
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