car no longer starts with the key

Question

Installed evo all with T harness kit in a 2010 Mustang.  All went well and the remote start works as it should, however the car will no longer start using the key.  Can start it with remote and then turn the key to keep it running but won't start with either key.  Security light flashes in the dash when trying to start with key.

Anyone ever have this issue

Answer 1

So an hour and a half of troubleshooting and I finally found tha the issue was the rubber gromet in the steering column cover that goes around the ingnition switch had caught on the ignition and was pushing out a little bit.  This combined with the additonal sparkly ring my daughter had around the switch was pushing the key just a little out of the switch, triggering the security system.  tucked the rubber back in place and all is good in the world!