Quote:
Originally posted by fahoumh
don't some US states have a DRL requirement? 
btw, the highbeams aren't functioning at full intensity when in "DRL mode", right?
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Nope--no states require them. Many recommend them and some have laws (like NY) where you have to have headlights on when your wipers are on. But it is not yet a DOT requirement. If it was, *every* car made in the country would have to have them standard, since they don't know where you may live or drive to. Same with cars sold in Canada.
And yes, that's why the wiring is so much more complex than just switching a couple connections. The highbeams run at a lower power/wattage. Plus they run independantly of the rest of the exterior lights.