Join Date: Oct 2007
Location: SoCal (SF Valley) 91343
There's a farily simple way to check if it's the wiring. Aside from a visual inspection of the wires and the connections, you can swap one of the wires in the 8 pin plug on the left (as you sit on it) side of the bike attached to the battery box. IIRC< it's the blue wire, pop the spade out of its slot and move it over to the next slot. Turn the key on, and if the headlight comes on then the problem is in all likelihood the headlight relay, which is inside that junction box, and is not replaceable unless you buy a whole new box. There was some talk of people experimenting to see if they could get the box open and do the relay swap without destroying it, but IDK if it was ever done successfully. You're definitely in the right place to get this fixed, though. ALong with any other issues that may come up. For more on this, do a search for "headlight relay" +blue and you should get some hits.