FORD 2003 F-150 v.1 - Manual (Page 78)

KEYS
The key operates all locks on your vehicle. In case of loss, replacement
keys are available from your dealer.
You should always carry a second key with you in a safe place in case
you require it in an emergency.
Refer to SecuriLock
௢ Passive Anti-Theft System for more information.
POWER DOOR LOCKS (IF EQUIPPED)
If the door does not unlock when
the U is pressed, see Interior
power door disable feature in the
Remote entry section in this
chapter.
Press U to unlock all doors and L to
lock all doors.
U L
Locks and Security
78