K 2500 Truck 4WD V8-6.5L DSL Turbo VIN S (1998)
Audible Warning Device: Component Tests and General Diagnostics
FASTEN SAFETY BELTS WARNING ALARM
The Fasten Safety Belts Warning Alarm sounds when the Ignition Switch is in the RUN, BULB TEST or START position with the LF safety belt
not fastened. When the LF Safety Belt is not fastened, ground is sensed at the Audio Alarm Module. The alarm will sound for approximately five
seconds. 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
LF Safety Belt is unfastened, the module connects voltage to Terminal 3 for the Fasten Safety Belts Indicator.
KEY-IN WARNING ALARM
The Key-In Warning Alarm will sound if the ignition key is in the Ignition Switch with the Ignition Switch in ACC, LOCK, or OFF with the LF
Door open. When the ignition key is in the Ignition Switch and the LF Door is open, the Key-In Warning Buzzer Switch is closed as is the LF
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 LF door is closed, or the Ignition
Switch is turned to RUN.
LAMPS-ON WARNING ALARM
The Lamps-On Warning Alarm will sound if 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, the Lamps-On
Warning Alarm sounds. The Lamps-On Warning Alarm can be silenced by either turning the Headlamp Switch to the OFF position or turning the
Ignition Switch to RUN.
