Sorry about reviving an old post but with over 1600 views I thought I should point out the info here may be incorrect, the side lights and DRL's are not wired in series, not on my wifes 2011 XC60 DRIV'e at least. Side lights are working, DRL's aren't, see YT vid. Even with the DRL's unplugged the side lights still work so can't be wired in series with the DRL's.
DRL's work 100%, taken them out and tested them. No power at the connectors so I'm guessing a blown fuse or a faulty relay?
You guys have any idea's?