Astro Van L AWD V6-262 4.3L VIN Z (1994)
Audible Warning Device: Description and Operation
The Warnings and Alarms System sounds a buzzer or chime to bring attention to one or more of several conditions. These conditions are:
1. The lamps are on and the Ignition Switch is turned to LOCK, OFF, or ACC.
2. The key is in the Ignition Switch when the driver's door is open.
3. The safety belt is unbuckled when Ignition Switch is in any position but OFF or ACC.
Voltage is supplied at all times through the STOP-HZ Fuse through ORN (140) wire to supply voltage to the Audio Alarm Module.
Ignition Key Warning
Whenever the key is in the Ignition Switch, the Ignition Switch is in LOCK, OFF, or ACC, and the driver's door is open, the LT GRN (80) wire
signals a ground to the Module. This sounds the alarm.
Safety Belt Warning
With the Ignition Switch in RUN or START, voltage is supplied through the GAGES fuse through PNK/BLK (39) wire to the Audio Alarm
Module. With the driver's safety belt not buckled, the BLK (238) wire sends a ground signal to the module. The ground signal on the BLK (238)
wire is also sent to the Diagnostic Energy Reserve module of the AIR BAG system. The Fasten Belts Indicator always goes on for about five
seconds when the Ignition Switch is turned to RUN or START.
Lights-On Warning (Chime Only)
When the Light Switch is in HEAD or PARK and the Panel Dimmer Switch is not at the dimmest setting, voltage is supplied through the INSTR
LPS Fuse to the Audio Alarm Module. With the Panel Dimmer Switch at its dimmest setting, the current to the Audio Alarm may not be enough to
be sensed by the module. When the Ignition Switch is turned to RUN or START, voltage is supplied through the GAGES Fuse and the PNK/BLK
(39) wire to the Module. These two voltages are sensed and the alarm is not sounded.
When the Ignition Switch is turned to LOCK, OFF, or ACC, the GAGES Fuse loses voltage. The Audio Alarm Module senses the change. If
voltage is still available from the INSTR LPS Fuse, voltage from the STOP-HZ Fuse is supplied to sound the alarm. The alarm can be turned off
by turning the Light Switch off. The Module no longer senses voltage from the Light Switch, so the alarm does not sound.
