Section 13-09: Gauges/Warning Devices, Chime/Buzzer System
1996 F-150, F-250, F-350, F-Super Duty Chassis Cab Workshop Manual
DESCRIPTION AND OPERATION

Headlamp Switch On Warning (Available on Some Models)

The warning chime/buzzer sounds when the headlamp switch (11654) is in PARK or HEAD and the driver's door is open, and continues to sound until the headlamp switch is moved to OFF or the door is closed. When the headlamp switch is in PARK or HEAD, power is supplied through Circuit 14 (BR) to the module. When the driver's door is open, the driver's door lamp switch (13713) is closed and power is supplied to the module through Circuit 159 (R/PK).