Well, the ignition switch has been giving me grief - not recognizing that I've removed the key, for example. I reinsert it and remove it again and it stops dinging.
this happens to my 01 basically i start the car and the key isnt going back to the on position and therefore makes the lights not work. I start my car then manually put the key to the on position by moving it to the left a little til it clicks. Doing this usually helps when i take the key out you hear the clicking sound and the radio goes off. Sometimes i have to put the key back in and hear the click then remove.