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Posted by CDNRatMan
- June 08, 2013, 12:40:18 PMTroll then should there not be a hole somewhere in the headlight reflector that would be the spot for this.....
Posted by Troll
- June 08, 2013, 12:13:42 PMA lot of European countries require that "extra" bulb in the head light ads a daytime running light. I had one in my Guzzi, and I know they are present on BMWs. It's connected to the tail light circuit, and goes on when ever the ign. is turned on. In the U.S., the headlight is required during the day, so this bulb is not present.
Posted by CDNRatMan
- June 08, 2013, 11:52:31 AMRicardo:
I am not a electronic person, but a stab in the dark here, I went out and looked at my 800 Canadian version to be sure, and I am going to make a bet here, that little lite is something the PO has added into the system, why? for what? not sure. But just looking at your picture it looks that way, have you traced that wire back to the origin were it is spliced, or connected into the system.
Once more just a guess but perhaps that was meant to be mounted and as an indicator for your spot lights? I would trace it back and see what it does, and which fuse runs it....or if all is working leave it as a winter project to figure it out........
Posted by Ricardo
- June 08, 2013, 11:07:44 AMOk, I'm not sure what it was that I did, but it's working now.
The small bulb is always on. The H4 acts as both low and high beam.
I again reseated the bulbs and most cables along the lines I could find. I also checked the fuses under the seat, and there's only one fuse for "Head". I pulled all of them out anyway and they checked OK. I twitched with the handle bar controls some and checked cables in the cable housing a third time today.
So...something of what I did helped 
Overjoyed...motorcycle mechanics truly is Zen. Thanks...
Posted by Ricardo
- June 08, 2013, 09:09:55 AMDrift1: No, but I've quickly figured out. It's impressive even!
Seriously, thanks a lot guys, this really helps a lot!
I've reseated all the cables that have these plastic tubings binding them together (not sure what they're called in English) and checked all other ends. They're all firm and the connectors seem clean. I've also traced the cables from the H4 socket as far as I can without removing the seat. It all seems good with no tears.
But here's another thing...I have two bulbs in the head light housing. One small one which is probably just 3W or 5W and then the H4 one. The small bulb will always light up, no matter what. The H4 one will never light up, regardless.
Sorry if I'm being stupid here, but according to Greenbarns little diagram for the H4, this halogen bulb should actually be providing both low and high beam. So what's the small bulb for? Logic dictates that it can't be the parking light, since it's always on - even when the key is *not* in parking...
I'll check the volt out on the H4 socket and see what I get. In the meantime, here's a picture of how it all looks (the black that goes to blue are two extra mounted head lights):
Posted by greenbarn
- June 07, 2013, 20:28:53 PMthis may be helpful: diagram for the plug on the 9003/ H4 bulb:
Posted by Troll
- June 07, 2013, 19:51:25 PMI figured it would be the same. The switches and the rest of the parts are the same....
Posted by CDNRatMan
- June 07, 2013, 19:47:44 PM 
Troll looks like the wiring diagram in my 800 manual......
Posted by Troll
- June 07, 2013, 18:16:17 PMI'm going to go out on a limb and say they are the same...this is the same wiring as my W-650. Can't see any reason for them to reinvent the wheel with headlight wiring...
Posted by greenbarn
- June 07, 2013, 18:10:06 PMHey, Troll. That looks like a diagram for a 1500 (it has a FI light, and a fuel level indicator light). I suppose, though, the 800's light circuit is probably the same, do you think?? I don't have my manual with me or I'd look...
Posted by Drift1
- June 07, 2013, 18:05:52 PMRicardo,did anyone ever tell you how much knowledge and support is on this forum.....
Posted by greenbarn
- June 07, 2013, 17:35:35 PMFANTASTIC - a wiring diagram. Just what the doctor ordered.
Posted by Troll
- June 07, 2013, 17:32:18 PMDoes the blue indicator on the dash come on with the high beam, even though the light does not? If it does, then you have an issue with the bulb or the socket. If it does not, then the problem is with a connector inside the headlight, or the switch, itself. The wire for the high beam is red and black.
Posted by greenbarn
- June 07, 2013, 17:20:44 PMLike they said, OE bulb is a single bulb, 2 filaments. What you really need to troubleshoot this is a test light, or a volt meter. You'll need to check for voltage at the headlight plug. If it is the OE 2 filament bulb, you should have 3 wires in plug. One should be ground (-) and the other two should be 12v when either the high or low beam is on.
If you have proper voltage at the plug for High, it has to be a bulb problem (I have had bulbs be bad out of the package. I have also had bulbs look 100% fine and be bad).
If there is NO voltage on the plug for High, then you need to start tracing the wiring backwards to see where your open condition is. If you see any splices in the wire, for sure check them.
Hope this helps
Posted by Drift1
- June 07, 2013, 17:10:38 PMRicardo.....I just checked my bulb as well and like RATMAN I have a single bulb with double filament as well.I'm going to have to agree with you RATMAN I think the highbeam filament is burned out.If your not sure what to look for on the bulb let us know.This should be an easy fix being you have all other lights working.