Ford F-150 Owner's Manual page 231

Many tether straps cannot be tightened if the tether strap is hooked to
the loop directly behind the child seat. To provide a tight tether strap:
1. Route the tether strap under the
head restraint and through the loop
directly behind the child seat.
2. Route the tether strap behind the
head restraint supports to a loop
behind an adjacent seating position,
and hook the strap hook onto the
loop. If using the driver's side, pass
the strap behind the shoulder belt
mounting for the center seat.
• Always put the tether strap
through the routing loop. The
head restraint support post will
hold the child seat tightly, but the head restraint post is not strong
enough to hold the child seat during a collision.
3. Tighten the tether strap
according to the child seat
manufacturer's instructions.
If the safety seat is not anchored properly, the risk of a child being
injured in a collision greatly increases.
If your child restraint system is equipped with a tether strap, and the
child restraint manufacturer recommends its use, Ford also recommends
its use.
2012 F-150 (f12)
Owners Guide, 2nd Printing
USA (fus)
Seating and Safety Restraints
231