Ford 2010 F-150 Owner's Manual page 144

Locks and Security
4. After three seconds but within 10 seconds of turning the ignition to
the 1 (off) position, insert the second previously coded key into the
ignition.
5. Turn the ignition from the 1 (off) position to the 3 (on) position. Keep
the ignition in the 3 (on) position for at least three seconds, but no more
than 10 seconds.
6. Turn the ignition to the 1 (off) position and remove the second
previously programmed coded key from the ignition.
7. After three seconds but within 20 seconds of turning the ignition to
the 1 (off) position and removing the previously programmed coded
key, insert the new unprogrammed key (new key/valet key) into the
ignition.
8. Turn the ignition from the 1 (off) position to the 3 (on) position. Keep
the ignition in the 3 (on) position for at least six seconds.
9. Remove the newly programmed coded key from the ignition.
If successful, the new coded key(s) will start the vehicle's engine and the
theft indicator will illuminate for three seconds and then go out.
If not successful, the new coded key(s) will not start the vehicle's engine
and the theft indicator will flash on and off and you may repeat Steps 1
through 5. If failure repeats, bring your vehicle to your authorized dealer
to have the new spare key(s) programmed.
Note: To program MyKey features, refer to MyKey in this chapter.
144
2010 F-150 (f12)
Owners Guide, 1st Printing
USA (fus)