This has puzzled me for years. When I was a kid, it seemed like they functionede normally and predictably. Three positions. But the last few years, the switch positions seems to turn the light on of off unpredictably.
I've got a 1998 Nissan Altima now that turns the light on in two positions - but never just when the door opens. This function for some weird reason seems to fail on every car I've had recently.
Any clues about this?