If the combo ignition key and remote control fob for your 12th
generation (2009, 2010, 2011, 2012, 2013 & 2014) Ford F150 has
stopped working, you probably just need to change the coin cell battery.
To view my quick DIY tutorial for the procedure, click on the link
below.
Here's the instructions page -
http://www.paulstravelpictures.com/Ford-F150-Key-Fob-Battery-Replacement-Guide/index.htmlThe steps should be the same for the Ford Super Duty F250, F350 and F450 trucks.
Cheers,
Paul