Ford Mustang (2005-2014) Owners Manual: Safety belt warning light and indicator chime

This lamp illuminates and an audible warning will sound if the driver’s safety belt has not been fastened when the vehicle’s ignition is turned on.
Conditions of Operation

Fastening the safety belts
The front outboard and rear safety restraints in your vehicle are
combination lap and shoulder belts.
The presenter arm (available on the coupe only) is intended to improve
access to the safety belt ...
Safety belt-minder
This feature supplements the safety belt warning function by providing
additional reminders by intermittently sounding a chime and illuminating
the safety belt warning light when the driver’s or fro ...
Other materials:
Component Tests
Driveline Vibration
An analysis of driveline vibration can also be conducted using the Vibration
Analyzer; follow the
manufacturer's directions.
Driveline vibration exhibits a higher frequency and lower amplitude than does
high-speed shake.
Driveline vibra ...
Inflating your tires
Safe operation of your vehicle requires that your tires are properly
inflated. Remember that a tire can lose up to half of its air pressure
without appearing flat.
Every day before you drive, check your tires. If one looks lower than the
others, use a tire ga ...
Instrument Cluster Replacement
When it is necessary to install a new instrument cluster, contact the
Instrument Cluster Program.
Gauge Indication Systems
Tachometer
Engine rpm information is relayed to the instrument cluster from the
powertrain control module (PCM)
over the standard ...
