Ford Aviator 2005 Owner's Manual page 198

Seating and Safety Restraints
BeltMinder
The BeltMinder feature is a supplemental warning to the safety belt
warning function. This feature provides additional reminders to the
driver that the driver's safety belt is unbuckled by intermittently
sounding a chime and illuminating the safety belt warning lamp in the
instrument cluster.
If...
The driver's safety belt is not
buckled before the vehicle has
reached at least 3 mph (5
km/h) and approximately 5
seconds has elapsed after the
safety belt warning light has
turned off.
The driver's safety belt is
buckled while the safety belt
indicator light is illuminated
and the safety belt warning
chime is sounding...
The driver's safety belt is
buckled before the ignition
switch is turned to the ON
position...
198
2005 Aviator (231)
Owners Guide (post-2002-fmt)
USA (fus)
Then...
The BeltMinder feature is activated -
the safety belt warning light
illuminates and the warning chime
sounds for 6 seconds every 30
seconds, repeating for approximately
5 minutes or until safety belt is
buckled.
The BeltMinder feature will not
activate.
The BeltMinder feature will not
activate.