FORD 2002 F-150 v.3 - Manual (Page 160)

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 through
the loop directly behind the child
seat.
2. Attach the strap hook onto the
loop behind an adjacent seating
position.
3. Install the child safety seat tightly
using the safety belts. Follow the
instructions in this chapter.
4. Tighten the tether strap
according to the child seat
manufacturer’s instructions.
Seating and Safety Restraints
160