Ford 1997 Aerostar Manual page 114

Dual locking mode retractors operate in two
ways:
Vehicle sensitive (emergency) locking mode
In this operating mode, the shoulder belt
retractor will allow the occupant freedom of
movement, locking tight only on hard braking,
hard cornering or impacts of approximately
5 mph (8 km/h) or more. The retractor can also
be made to lock by pulling the belt out quickly.
Automatic locking mode
In this operating mode, the shoulder belt
retractor will be automatically locked and will
remain locked when the combination
lap/shoulder safety belt is buckled, and does not
allow the occupant freedom of movement. This
mode provides the following:
A tight lap/shoulder belt on the occupant.
Child safety seat installation.
This mode must be used when installing a child
safety seat on the front passenger seat and rear
outboard seats where dual locking retractors are
provided.
To switch the retractor from the emergency
locking mode to the automatic locking mode,
perform the following steps:
1. Buckle the lap/shoulder combination belt.
2. Grasp the shoulder portion of the belt and
pull downward until all of the belt is
extracted and, when allowed to retract, a
clicking sound is heard. At this time, the belt
retractor is in the automatic locking mode
(child restraint mode).
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