Key Reminder Switch: Description and Operation

IGNITION KEY WARNING BUZZER

With the key in the ignition switch in the OFF or ACC position, and the driver's door open, the warning buzzer will sound. A battery positive voltage is supplied.
^ from key switch terminal (2)
^ to BCM terminal (31).
Ground is supplied.
^ from front door switch LH terminal (2)
^ to BCM terminal (29).
Front door switch LH terminal (3) is grounded through body grounds (B16) and (B19).