My headlights go off with the key, so there is no way to leave them on or turn them on without the key in the "on" position. The parking lights can however be left on.  I guess I don't see the point of the device below. AND, I have chimes, not a buzzer for the key left in the ignition warning or what I called the door chime. Apparently I have all kinds of features that most people don't in my van! I will ask for a premium if I ever sell!! I have an 89 btw.

Troy

Here's what I did... works great. Only works on 86-91s though...

http://www.van-cafe.com/home/van/page_764_126/battery_saver_alarm.html