My car cuts if when I turn my headlights on cut lights off car stays running.

Sounds like you've grounded out something with that radio installation. Have you tried uninstalling the radio completely and putting the wires back the way they were to see if that fixes the problem? A lot of times, how the original radio was wired isn't how the new radio needs to be wired and you need to probe the snap harness to find the always on wire as well as the ignition on wire...and make sure that you hook the poz to poz and neg to neg.