Head light out, fuses OK. - Wrist Twisters
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post #1 of 5 Old 09-25-2017, 06:12 PM Thread Starter
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Head light out, fuses OK.

Hello fellow 919 owners! (it's my first post on this forum).

I come looking for help because I have a problem that's bugging me.

The other day I was installing a new horn so cagers could actually hear me, and I must have done something wrong because my head light went out...
But I am not sure if it was related since I don't know exactly when it went out (whether it happened when I was working on the bike, or if it was right after).

Anyway, it could be a wire that I pulled, a short circuit that burnt something, a fuse...
I've been looking at this diagram to try to figure this out: http://www.cb750c.com/publicdocs/CB9..._Schematic.jpg

So far, here is what I checked:

Battery: OK
Main 30 Amp fuse: OK
Head Light / Back lights 10 Amp fuses: OK ((( BUT, no juice seems to be flowing through the Head Light fuse (it's under the seat right?) )))
Light bulb: OK
Headlight switch: OK
Starter switch: not tested yet.

I stopped there because I couldn't find the cable for the starter switch (unless it's black and red, not black and orange like on the diagram).

One good thing is that if I run a wire from the battery (+) to the blue&white wire that goes to the Headlight Dimmer Switch, my bulb lights up (and the switch works).

Some details that matters: the bike starts just fine. I have everything working (break lights, signals, speedo, horn, and so on). the headlight is the only thing not working.
Another detail: at roughly the same time the headlight went out I started hearing a noise in the front every time I hit a small bump on the road. It sounds like there's a bunch of coins in a metal box jumping around

Could it be the ignition switch?
Is there any other fuses that I missed?

I'm hoping a wizard among you will know exactly what's wrong

Cheers!

(If I have to, I'll the run a wire with a fuse from the battery straight to the headlight switch but i'd rather avoid that).
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post #2 of 5 Old 09-26-2017, 05:19 AM
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Normally this issue has been traced back to the starter switch and a broken solder joint. The wiring runs through there to cutout the headlight while the bike is starting.

https://www.wristtwisters.com/forums/...king-6400.html

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post #3 of 5 Old 09-26-2017, 08:24 AM
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Welcome to the forum...

Oh, and what he said ^^^^^

2006 Honda 919 TURBO
2005 Honda 919
2014 Honda CB1000R
2005 Ducati Monster S4R
2000 Honda 750 Nighthawk -Sold
1997 Suzuki DS350SE -Sold
2002 Honda 750 Shadow ACE -Sold
2006 Kawasaki ZX-6R -Sold
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1992 Honda 750 Nighthawk -Sold
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post #4 of 5 Old 09-30-2017, 11:07 AM Thread Starter
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Quote:
Originally Posted by marylandmike View Post
Normally this issue has been traced back to the starter switch and a broken solder joint. The wiring runs through there to cutout the headlight while the bike is starting.

https://www.wristtwisters.com/forums/...king-6400.html
You are a WIZARD!
I finally found the wires and tested them and it confirmed what you said, so I opened the starter switch and found the broken solder joint.

Thanks so much guys
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post #5 of 5 Old 09-30-2017, 05:55 PM
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Quote:
Originally Posted by maxlast View Post
You are a WIZARD!
I finally found the wires and tested them and it confirmed what you said, so I opened the starter switch and found the broken solder joint.

Thanks so much guys
Excellent man. Glad you got it fixed!


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