Ford 2003 Mustang Workshop Manual page 3984

Functional Test III (System Road Test Inspection)
1. NOTE: If the RH or the rear safety belts are to be tested, the assistance of a passenger is
required.
Fasten the safety belts and proceed to a safe area.
2. Attain a speed of 8 km/h (5 mph).
3. WARNING: The driver and passenger must be prepared to brace themselves if the
retractor does not lock.
Test the safety belts.
1. Grasp the shoulder harness and prepare to lean forward.
2. WARNING: The maximum brake application should be on dry concrete or
equivalent hard surface, NEVER on wet pavement or gravel.
WARNING: The driver and passenger must be prepared to brace themselves
in the event the retractor does not lock.
Make a maximum brake application without a skid.
3. NOTE: Do not jerk on the safety belt webbing when carrying out this test.
Lean forward slightly when the brake application is made.
4. The safety belts should lock up with minimum webbing extension.
5. If there is a lockup of both shoulder straps, the safety belt assemblies are functioning correctly.
Should either or both retractors fail to lock up at the 8 km/h (5 mph) speed, repeat the test at a
constant 24 km/h (15 mph) speed. (This test must be carried out with the assistance of a RH
front or rear passenger if the RH front or rear safety belts are to be tested).
6. CAUTION: Before installing a new safety belt assembly, inspect the mounting area
for damage and distortion. If the retractor of a new safety belt assembly has been bolted
into a damaged or distorted mounting area, the retractor could be warped and may not
function. If this is the case, remove the retractor and return the sheet metal to the
original configuration and install another complete safety belt assembly.
If the retractors do not lock up at the 24 km/h (15 mph) test, return the vehicle for service of
malfunctioning safety belts.
Functional Test IV (Automatic Locking Retractor)
WARNING: After any vehicle collision, the safety belt system at all outboard seating
positions (except driver, which has no "automatic locking retractor" feature) must be checked
by a qualified technician to verify that the "automatic locking" feature for child seats is still
functioning correctly, in addition to other checks for correct safety belt system function. A new
safety belt and retractor assembly must be installed if the safety belt assembly's "automatic
locking retractor" feature or any other safety belt function is not operating correctly when
checked according to the procedures in the workshop manual. Failure to install a new safety
belt and retractor assembly could increase the risk of injury in collisions.
1. Position the seat back into the full up position.