RAM 2500 Truck 4WD V10-8.0L VIN W (1997)
Malfunction Lamp / Indicator: Description and Operation
SYSTEM OPERATION
The airbag indicator lamp gives an indication when the airbag system is faulty or inoperative. The lamp is turned on by the Airbag Control module
(ACM) for about seven seconds when the ignition switch is turned to the On position as a bulb test. After the bulb test, the lamp is controlled by
the ACM based upon the results of the airbag system self-tests that are performed by the ACM.
The ACM continually monitors the airbag system circuits and sensors to decide whether the system is in good operating condition. The ACM then
switches the lamp ground circuit to turn the lamp on or off. If the ACM turns the lamp on after the bulb test, it indicates the ACM has detected a
system malfunction and/or that the airbag system has become inoperative.
CIRCUIT OPERATION
Circuit F14 supplies power for the airbag warning lamp. The lamp illuminates when the Airbag Control Module (ACM) provides ground for the
lamp on circuit R41.
Circuit R41 connects the airbag warning lamp to cavity 7 of the ACM 13 way connector. The airbag warning lamp is part of the instrument cluster.
