Mechanics

F150 AIRBAG WARNING LIGHT IS FLASHING

1998 Ford F-150

1998 Ford F150

What's the reason behind the airbag warning light flashing 5 times, than 2 times, repeating this sequence 5 times before remaining solid?
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Tagloff
December 3, 2008.



YELLOW ABS WARNING LIGHT SELF-CHECKS OKAY, BUT AUTOMATICALLY BEGINS FLASHING (1998 MODELS & 1999 PICKUP)
NOTE: DTC will appear as one or more short pulses followed by one long pulse.

Turn ignition on. Observe Yellow ABS warning light. If Yellow ABS warning light flashes a DTC sequence, note DTC and go to next step. If Yellow ABS warning light flashes, but does not indicate a DTC, go to step 4.
Turn ignition off. Disconnect 14-pin RABS module connector. Turn ignition on. Using DVOM, measure voltage between RABS module connector terminal No. 12 (Black/Orange wire) and ground while wiggling wiring harness. See WIRING DIAGRAMS. If voltage is greater than 10 volts, go to next step. If voltage is less than 10 volts, repair Black/Orange wire or Red wire between RABS module and fuse panel. Perform appropriate test for DTC retrieved.
Turn ignition off. Disconnect negative battery cable. Using DVOM, measure resistance between RABS module connector terminal No. 4 (Light Green/Yellow wire) and ground while wiggling wiring harness. See WIRING DIAGRAMS. If resistance is steady and less than 5 ohms, replace RABS module. Recheck system operation. If resistance is not steady or greater than 5 ohms, repair Light Green/Yellow wire and/or Black/Light Blue wire between RABS module and ground connection. Recheck system operation.
Turn ignition off. Disconnect 14-pin RABS module connector. Turn ignition on. Using DVOM, measure voltage between RABS module connector terminal No. 1 (Light Blue/Pink wire) and ground. See WIRING DIAGRAMS. Using DVOM, measure voltage between RABS module connector terminal No. 9 (Light Blue/Pink wire) and ground. If voltage is greater than 10 volts, replace RABS module. Recheck system operation. If voltage is less than 10 volts, repair Light Blue/Pink wire between RABS module and fuse panel (Van) or ignition switch (Pickup).

Dave H
Dec 3, 2008.