Ok finally got my Mustang running and driving, found that my alternator was bad. Replaced my alternator and now i am getting dashes on the odometer and the car will not turn over. Been checking fuses and diodes, new ecm installed before this happened and had the car flashed to get it running. Somewhere in the mix of the repairs lost the spare key so i can't try that. But it is not showing the theft lock on the dash when i try to start the car, also this is a new battery. I tried to put jumper cables to help if that was the issue. Has anyone fought this issue i been researching this problem and can not find a good answer. It is almost like there is no communication to my new ecm, new battery, new alternator had the car flashed and bought and cut new key. Any help would be appreciated

 

I forgot to mention it is a 2005 GT 4.6 manual