Ford F-150 Owner's Manual page 220

Seating and Safety Restraints
5. Insert the belt tongue into the
proper buckle (the buckle closest to
the direction the tongue is coming
from) for that seating position until
you hear a snap and feel the latch
engage. Make sure the tongue is
latched securely by pulling on it.
6. While pushing down with your
knee on the child seat pull up on
the shoulder belt portion to tighten
the lap belt portion of the
combination lap and shoulder belt.
7. Allow the safety belt to retract and remove any slack in the belt to
securely tighten the child safety seat in the vehicle.
8. Attach the tether strap (if the child seat is equipped). Refer to
Attaching child safety seats with tether straps later in this chapter.
220
2011 F-150 (f12)
Owners Guide, 3rd Printing
USA (fus)