Ford F series Owner's Manual page 83

Doors
Anti-theft front door lock knobs
Anti-theft lock knobs are designed to preclude
unlocking the door by pulling up on the bullet
type lock knob. To unlock and open the front
door from the inside of the vehicle, pull on the
inside door handle.
Tailgate
Tailgate operation
When open, the tailgate load should not exceed
500 lbs (227 kgs). If you want to load heavy
items onto your vehicle, Ford recommends that
you load them one at a time, directly on the bed
floor to avoid damage to the tailgate or its
supports.
To release the tailgate:
Open the tailgate as directed above, but support
it to allow for slack in the cables at both sides.
Use a coin or similar object to pry the spring
clip (on each upper cable connector) past the
head of the support screw. Doing so will allow
you to center the wider opening in the connector
over the screw head and disconnect it.
If you disconnect the upper end of each cable,
you can lower the tailgate completely.
NOTE: Step bumpers or hitches may damage
the tailgate if it is lowered completely.
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