FORD 2012 Expedition v.2 - Manual (Page 240)

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.
Driving
240
2012 Expedition (exd)
Owners Guide, 3rd Printing
USA (fus)