Tahoe 4WD V8-393 6.5L DSL Turbo VIN S (1995)
Audible Warning Device: Component Tests and General Diagnostics
Fasten Belts Warning Alarm
The Fasten 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. The Audio Alarm Module has a logic circuit which senses whether or not the LH front
safety belt is fastened. When the LH front safety belt is not fastened, voltage being sensed at the Audio Alarm Module is high, thus indicating that the LH
front safety belt is unfastened. The alarm will sound for approximately five seconds if the LH front safety belt is not fastened. The Audio Alarm
Module's Fasten Safety Belt Warning Alarm also incorporates an indicator within the Instrument Cluster Printed Circuit. The Fasten Safety Belts
Indicator works in conjunction with the Fasten Belts Warning Alarm. Voltage is applied to the indicator through the GAUGES FUSE 4 when the Ignition
Switch is in the RUN, BULB TEST or START position. The Audio Alarm Module controls the ground path to the indicator. When the Audio Alarm
Module receives a signal that the LH Front Safety Belt is unfastened, it completes the ground path for the Fasten Safety Belts Indicator.
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. The Audio Alarm Module incorporates a logic circuit which
senses whether or not the conditions are present for activating the alarm (ignition key in the Ignition Switch and the LH front door 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, the voltage being monitored at the Audio Alarm Module is low, thus indicating that the conditions are present for
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 must be in the
HEAD or PARK position, The Panel Dimmer Switch is not in the fully dim position and the Ignition Switch must be 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 (if the Dimmer Switch in the Headlamp and Panel Dimmer Switch is
positioned at its dimmest setting, then the voltage present at the Lamps-ON Input terminal may not be high enough to activate the Lamps-ON Warning
Alarm). The Lamps-ON Warning Alarm can be disabled by either turning the Headlamp and Panel Dimmer Switch to the OFF position or turning the
Ignition Switch to the RUN position.