Originally Posted by Crowz

If the light never goes out the car isn't going to "sleep". That's why your battery is dying basically.

It should not go out instantly. It takes 16 minutes to "go to sleep". If you open the door or use the remote key the time is reset. So you have to look in the window after 16 minutes to see if the lights on. I have seen some take as long as 20 minutes.