How do i perform the 2012 Ford f250 bcm reset?

There is no way to manually reset the body control module on a 2012 Ford F-250. Instead You're going to need to pull the fuse for it or to make the job even easier just disconnect the battery. The battery will have to remain disconnected for 20 minutes so that the vehicle can return fully to it's factory settings. Once the time has passed You can reconnect Your battery and You should be able to use Your vehicle as normal. If neither of these methods work then You're going to need to take it in to Your local dealership.