I have a 2000 Mustang and just recently I noticed that when I turn my car off the theft light either stays on or blinks at roughly a 2 second interval and does not blink rapidly as is the norm. However the my car starts and runs fine. I have tried reprogramming the ECU as well as disconnecting the battery to reset the ECU each of which did not fix the problem. Has anyone else experienced this problem? Possible causes? Any ideas how to fix this aside from taking it the the Ford dealer?