Ford 2003 Mustang Workshop Manual page 3985

2. Position the height adjuster in the full down or up position.
3. Latch the seat belt buckle and tongue assembly.
4. Pull the shoulder belt out until the automatic locking retractor (ALR) feature is activated.
5. Release the shoulder belt and allow it to retract until it stops.
6. Pull on the shoulder belt to check that the belt has remained in the ALR mode. If the belt is not
locked, install a new safety belt and retractor assembly.
7. Unlatch the safety belt tongue from the buckle and allow the safety belt to retract to its stowed
position.
8. Pull the shoulder belt to verify the retractor assembly has converted automatically out of the
ALR mode. If the shoulder belt remains locked in the stowed position, install a new safety belt
and retractor assembly.