Check the seat belt operation Ford F150
1. Check seat belts, buckles, latch plates and guide loops for obvious damage and signs of wear.
2. See if the seat belt reminder light comes on when the key is turned to the Run or Start position. A chime should also sound.
3. The seat belts are designed to lock up during a sudden stop or impact, yet allow free movement during normal driving. Make sure the retractors return the belt against your chest while driving and rewind the belt fully when the buckle is unlatched.
4. If any of the above checks reveal problems with the seat belt system, replace parts as necessary.