3500 4x4 Pickup L6-359 5.9L DSL Turbo (1996)
Audible Warning Device Control Module: Description and Operation
CIRCUIT OPERATION
The buzzer module sounds an audible warning tone. The tone sounds for seat belt warning, when the ignition key is in the ignition switch while the
drivers door is OPEN, or the headlamps are left ON with the drivers door open. The tone also sounds when the ignition key is in the ON position
while the drivers side seat belt is not buckled.
Power for the buzzer module is supplied on circuit M1 from fuse 17, a 15 Amp, in the fuse block. This fuse is the Ignition-Off Draw fuse (IOD)
and is HOT at all times. Power for the fuse is supplied on circuit A7. This circuit is protected by a 50 Amp fuse located in cavity 1 of the Power
Distribution Center (PDC).
When the parking lamps or headlamps are ON, the headlamp switch connects circuit G16 from the drivers side door jamb switch to circuit G26.
Circuit G26 connects to the buzzer module and the key-in switch. Circuit G16 from the drivers side door jamb switch also connects to the key-in
switch.
Circuit G13 from the buzzer module powers the seat belt warning lamp in the instrument cluster. Circuit Z3 at the instrument cluster provides
ground for the lamp.
Circuit G10 from the buzzer module connects to the seat belt switch. When the seat belt switch CLOSES a path to ground is completed on circuit
Z3. Circuit Z3 also grounds the buzzer module.
