Lamps-on Warning Buzzer

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 (FUSE 14) to the Audio Alarm Module through the GRA (8) wire. With the Panel Dimmer Switch at its dimmest setting, the current to the Audio Alarm module 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 IGN/GAU Fuse (FUSE 4) to the Module through the PNK (39) wire. These two voltages are sensed and the alarm is not sounded.

When the Ignition Switch is turned to LOCK, OFF or ACC, the IGN/GAU Fuse loses voltage. The Audio Alarm Module senses the change. If voltage is still available from the INSTR LPS Fuse (FUSE 14), voltage from the STOP-HZ Fuse (FUSE 1) is supplied to sound the alarm through the ORN (140) wire. 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.