Ford F-150 Owner's Manual page 280

Driving
3. Make sure the gearshift is in P
(Park).
4. Make sure the parking brake is
set.
5. Turn the key to 3 (on) without
turning the key to 4 (start).
Some warning lights will briefly illuminate. See Warning lights and
chimes in the Instrument Cluster chapter for more information
regarding the warning lights.
280
2011 F-150 (f12)
Owners Guide, 3rd Printing
USA (fus)
BRAKE