There are no "Kill Switches" on the F-16s. That story about debris showing a kill switch is BS.
However, none of them can fly a combat mission unless programmed with codes, rendering them subject to "approved" usage only, with software, which cannot be detected by any tools or expertise found in Pakistan.
Even the image posted by airomerix above is correct: "So far we are NOT AWARE...." Of course! They don't have the expertise to be aware!
My comments are still correct.
If anyone doubts them, please seek answers about detailed pre-sortie preps on the F-16s.
EDIT: Just a hint: please try to boot up a computer without its operating system working!
EDIT: No Iranian F-14 can fly a combat mission or fire its Phoenix missiles. They are toothless tigers, just flying airframes barely airworthy and flying on cannibalized parts.