K 1500 Truck 4WD V8-5.7L VIN R (1997)
Audible Warning Device: Component Tests and General Diagnostics
Fasten Safety Belts Warning Alarm
The Fasten Safety Belts Warning Alarm will sound when the following conditions are met simultaneously: The Ignition Switch is in the RUN, BULB
TEST or START position and the LH front safety belt is not fastened. When the LH front Safety Belt is not fastened, ground is sensed at the Audio
Alarm Module . The alarm will sound for approximately 5 seconds. The Diagnostic Energy Reserve Module (DERM) also senses ground when the LH
Front Safety Belt remains unbuckled. Refer to Air Bags and Seat Belts. The Audio Alarm Module's Fasten Safety Belt Warning Alarm also
Incorporates an indicator within the Instrument Cluster The Fasten Safety Belts Indicator works in conjunction with the Fasten Safety Belts Warning
Alarm. When the Audio Alarm Module receives a signal that the LH Front Safety Belt is unfastened, it connects voltage to Pin 3 for the Fasten Safety
Belts Indicator. See: Restraint Systems
Key-In Warning Alarm
The Key-In Warning Alarm will sound if the following conditions are met simultaneously: The ignition key must be in the Ignition Switch with the
Ignition Switch in the ACC, LOCK or OFF position and the LH Front Door must be open. When the ignition key is in the Ignition Switch and the LH
Front Door is open, the Key-In Warning Buzzer Switch is closed as is the LH Door Jamb Switch. when both of these switches are closed, ground is
sensed at the Audio Alarm Module activating the Key-In Warning Alarm. The Key-In Warning Alarm will stop sounding if the ignition key is removed
from the Ignition Switch, the LH front door is closed, or the Ignition Switch is turned to the RUN position.
Lamps-ON Warning Alarm
The Lamps-On Warning Alarm will sound if the following conditions are met simultaneously: The Headlamp and Panel Dimmer Switch is in the HEAD
or PARK position, the Panel Dimmer Switch is not in the fully dim position, and the Ignition Switch in the LOCK, ACC or OFF position. When the
Headlamp and Panel Dimmer Switch is in the HEAD or PARK position, voltage is applied through the ILLUM FUSE 14 to the Audio Alarm Module.
When voltage is sensed at the Lamps On input terminal of the Audio Alarm Module and there is an absence of voltage at the Ignition On Input terminal,
then the Lamps-On Warning Alarm will sound. The Lamps-On Warning Alarm can be silenced by either turning the Headlamp Switch to the OFF
position or turning the Ignition Switch to the RUN position.
