Radio buttons work only when turning ext lights on
 

Hi,
Need your help to troubleshoot this issue, the radio buttons work only when turning ext lights on. So weird, I can control the radio from the steering wheel with no issue when the lights are off, have any of you seen this issue?
Thank you in advance
Art

By "ext lights" do you mean headlights?
I had an issue once after I ran the battery down by leaving the lights on. Some of the idiot dash lights would stay on for a while. You might try disconnecting the battery...wait a few minute and reconnect it.