Pt cruiser turn key wont start nothing horn lights work battery ok

I had the same problem.does your key spring back? If it doesn't take out your tumbler remove your starter ignition switch,held on by one srew,remove top and bottom plasticcouple screws,two screws on top to remove blinker switchs and lights.under tumbler casing two small screws hold shift cble remove that and in between starter switch and tumbler the rest off your ignition. remove this at the more than likely at the end the soft metal has broken so instead off it having a square end it's rounded so it can't turn your ignition you will have to replsce that unit .goodluck It has been a real pain in the *** trying ti figure it out.

Change the egnition relay