Ford Mustang Owner's Manual page 73

Seating and Safety Restraints
Disconnect the combination lap/shoulder belt and
allow it to retract completely to disengage the
automatic locking mode and activate the vehicle
sensitive (emergency) locking mode.
After any vehicle collision, the front
passenger and rear outboard seat belt
systems must be checked by a qualified technician
to verify that the "automatic locking retractor"
feature for child seats is still functioning properly.
In addition, all seat belts should be checked for
proper function.
BELT AND RETRACTOR ASSEMBLY MUST
BE REPLACED if the seat belt assembly
"automatic locking retractor" feature or any other
seat belt function is not operating properly when
checked according to the procedures in Workshop
Manual.
Failure to replace the Belt and Retractor
assembly could increase the risk of injury in
collisions.
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.
2004 Mustang (mus)
Owners Guide (post-2002-fmt)
USA English (fus)
73