I can't rule out the DRL, like rasmataz stated. The blue wire should be ground, it grounds through the headlamp switch, note diagram. Even without the drl, I don't know why the lamp won't ground through the headlamp switch, on. With headlamp switch off, leave connector connected to headlamp, probe the blue wire, any voltage. If not, I suspect the lamp itself or the connector. You could use a redundant ground just to see if lamp will work?
Saturday, March 19th, 2011 AT 4:29 PM