FORD 2004 F-150 v.1 - Manual (Page 104)

Combination lap and shoulder belts
1. Insert the belt tongue into the proper buckle (the buckle closest to
the direction the tongue is coming from) until you hear a snap and feel it
latch. Make sure the tongue is securely fastened in the buckle.
• Front seats
• Rear seats (if equipped)
2. To unfasten, push the release button and remove the tongue from the
buckle.
• Front seats
Seating and Safety Restraints
104