FORD 1999 Explorer - Manual (Page 134)

If the shoulder belt portion of a combination lap and shoulder belt can
be positioned so it does not cross or rest in front of the child’s face or
neck, the child should wear the lap and shoulder belt. Moving the child
closer to the center of the vehicle may help provide a good shoulder belt
fit.
Do not leave children, unreliable adults, or pets unattended in
your vehicle.
To improve the fit of lap and shoulder belts on children who have
outgrown child safety seats, Ford recommends use of a belt-positioning
booster seat that is labelled as conforming to all Federal motor vehicle
safety standards. Belt-positioning booster seats raise the child and
provide a shorter, firmer seating cushion that encourages safer seating
posture and better fit of lap and shoulder belts on the child.
A belt-positioning booster should be used if the shoulder belt rests in
front of the child’s face or neck, or if the lap belt does not fit snugly on
both thighs, or if the thighs are too short to let the child sit all the way
back on the seat cushion when the lower legs hang over the edge of the
seat cushion. You may wish to discuss the special needs of your child
with your pediatrician.
SAFETY SEATS FOR CHILDREN
Child and infant or child safety seats
Use a safety seat that is recommended for the size and weight of the
child. Carefully follow all of the manufacturer’s instructions with the
safety seat you put in your vehicle. If you do not install and use the
safety seat properly, the child may be injured in a sudden stop or
collision.
Seating and safety restraints
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