Ford 2003 Explorer Owner's Manual page 113

Seating and Safety Restraints
the label. Also, use the safety belt extension only if the safety belt is too
short for you when fully extended.
Do not use extensions to change the fit of the shoulder belt
across the torso.
Safety belt warning light and indicator chime
The safety belt warning light illuminates in the instrument cluster and a
chime sounds to remind the occupants to fasten their safety belts.
Conditions of operation
If...
The driver's safety belt is not
buckled before the ignition
switch is turned to the ON
position...
The driver's safety belt is
buckled while the indicator
light is illuminated and the
warning chime is sounding...
The driver's safety belt is
buckled before the ignition
switch is turned to the ON
position...
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.
112
2003 Explorer (exp)
Owners Guide (post-2002-fmt)
USA English (fus)
Then...
The safety belt warning light
illuminates 1-2 minutes and the
warning chime sounds 4-8 seconds.
The safety belt warning light and
warning chime turn off.
The safety belt warning light and
indicator chime remain off.