I second this last question, mostly because the relevance of the possible answers I can think of depends upon exactly why the need for the original question might not be satisfied by the "DRL OFF" position of the light switch.

One reason to want the DRl's off would be to save energy, CO2 emissions, etc. (while driving in daylight). I have not done the calculation, but I suspect that keeping the DRL's off could save more energy than replacing a household incandescent bulb with a low energy flourescent, which seems to be a popular thing to do. For my money the safety benefit of the DRL's in daylight driving probably outweighs the energy savings benefit, but others may differ.

Another reason might be to avoid waste while not driving but with the electrical power on, e.g. while parked and warming the car up or while doing some kind of electrical diagnosis, etc.

But that brings me to another question. Does anyone know for sure whether (in the U.S. car):

A, any other lights are on in any circumstances when the switch is in the "DRL off" position

or

B, all lights are always off in the "DRL off" position.

The manual is no help on this question, and experimentation leads me to answer "B," but I'm not sure about the "always" part. In any event, i would appreciate knowing the answer for sure, and I note that in either case the design and/or switch position labeling is remarkable.

If the answer is "A," then there is no reliable switch position to turn all of the lights off.

And if the answer is "B," then the U.S. car has a switch position which turns all of the lights off but is not labeled "off" while the Canadian car has a switch position so labeled but which does not do so.

So, if anyone knows for sure, I would appreciate the answer.

My ignorance on this had consequences for me recently, but i'll tell that story in a separate thread, "The light switch and the dead battery", perhaps this weekend.

Jack