Section 13-09: Gauges, Warning Devices, Miscellaneous—Electronic
1993 Mustang Workshop Manual
DESCRIPTION AND OPERATION

Warning Chimes

 

Safety Belt Warning

When the ignition switch is turned to RUN or START, power is supplied through Circuit 640 (R/Y) to the warning chime module. The module then supplies power through Circuit 450 (DG/LG) to illuminate the FASTEN BELTS indicator for six seconds, whether or not the driver's safety belt is fastened. If the driver's safety belt is not fastened during this time, the safety belt buckle switch remains closed, supplying ground through Circuit 85 (BR/LB) to the warning chime module and causing it to sound for six seconds.

 

Key-In-Ignition Warning

The warning chime sounds when the driver's door is opened, with the key in the ignition switch, and continues to sound until the key is removed or the door is closed. When the key is in ignition, the key-in-ignition switch is closed and ground is supplied through Circuit 158 (BK/PK) to the warning chime module. When the driver's door is open, the driver's door courtesy lamp switch closes and power is supplied through Circuit 159 (R/PK) to the module.

 

Headlamp Switch On Warning

The warning chime sounds when the driver's door is opened while the main headlamp switch is on, and continues to sound until the switch is turned off or the door is closed.

When the main headlamp switch is on, power is supplied through Circuit 257 (W/R) to the warning chime module. When the driver's door is open, the driver's door courtesy lamp switch is closed and power is supplied through Circuit 159 (R/PK) to the module.