program your keys

this may help https://www.youtube.com/watch?v=S9h5MVI5wP8

http://blog.keylessentryremotefob.com/2013/02/2001-ford-expedition-key-fob-remote.html

I am guessing you have at least one good key. If so; 1. Insert an existing working key into the ignition cylinder. 2. Turn the ignition cylinder to ON (RUN) and back to OFF. 3. Remove the existing working key and, within five seconds, insert a second working key and turn it to ON (RUN) then back OFF. 4. Remove second working key and insert the new key before ten seconds have elapsed and turn it to ON (RUN). Leave it on for one second and turn back to OFF. 5. The security light will light up for three seconds to indicate that the new key has been successfully programmed. If you don't have a working key, you will need to go to the dealer.