Ford Expedition Owner's Manual page 186

Seating and Safety Restraints
Perform the following steps when installing the child seat with
combination lap/shoulder belts:
Note: Although the child seat illustrated is a forward facing child seat,
the steps are the same for installing a rear facing child seat.
1. Position the child safety seat in a
seat with a combination lap and
shoulder belt.
2. Pull down on the shoulder belt
and then grasp the shoulder belt
and lap belt together.
3. While holding the shoulder and
lap belt portions together, route the
tongue through the child seat
according to the child seat
manufacturer's instructions. Be sure
the belt webbing is not twisted.
186
2012 Expedition (exd)
Owners Guide, 1st Printing
USA (fus)