Bright Light indicator on, lights out!! - K-Bikes.com - Excellence in Motion
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post #1 of 40 (permalink) Old Aug 7th, 2006, 7:36 pm Thread Starter
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Bright Light indicator on, lights out!!

Lights worked great on the 1700 mile trip through the ozarks. Went for a short ride and noted the bright light indicator was on. Switch didn't change anything. Getting back to the garage it appears that only the parking light is lit, no low beam, no high beam.

I have the gps wired to the parking light and the connection may have touched metal when not connected to the unit, my fault. Would that have burned out both bulbs? Could it be a fuse?

It's an '04 k12gt.

Thanks,

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post #2 of 40 (permalink) Old Aug 7th, 2006, 8:54 pm
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This failure has been reported before on this site, and has happened to me. It is almost certainly a burned out ground wire. The headlamp assembly uses a common ground wire for both the high and low beams, which is known to burn out on some bikes. When the wire burns out, you lose both high and low beams, and the blue high-beam light is illuminated on the dash.

This exact thing happened to me last year on a trip 1,000 miles from home. Thank goodness I had PIAA's on a separate circuit. When I got back home, the dealer replaced the entire headlamp assembly with a new one under warranty.

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Last edited by rhhall; Aug 7th, 2006 at 8:56 pm. Reason: Edited to add: This was not caused by your GPS wiring.
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post #3 of 40 (permalink) Old Aug 7th, 2006, 10:04 pm
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Why, you didn't ask?
Because, when you lose that ground wire connection at the head light, the bulb elements no longer appear to light. However, power is applied to the lowbeam constantly. Since the bulbs have a common ground point, the electrons go through the low beam element to the highbeam element, and then back to the highbeam switch. There, on the output side of the highbeam switch is another connection, that goes to the blue indicator that normally lights when you turn on the high beam. However, since there's now power from the highbeam (being fed by the low beam), and since there's a good ground on the other side of the blue highbeam indicator, the electrons flow through the indicator to get to that coveted place called ground.
If you get into a dark area, you can see that the highbeam is slightly glowing. Won't be able to see the low-beam glowing, as it's hiding behind the highbeam reflector.



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post #4 of 40 (permalink) Old Aug 7th, 2006, 10:39 pm
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Jeez, I'm an ME, not a dang Sparky. All I know is that you've got to keep the magic smoke on the inside of the wires.

Seriously, do you have a wiring diagram, or did you just ask someone intelligent?

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post #5 of 40 (permalink) Old Aug 8th, 2006, 1:25 am
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No wiring diagram...yet.

Thanks for the compliment, though.



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post #6 of 40 (permalink) Old Aug 8th, 2006, 7:37 am Thread Starter
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Very helpful!!

I guess there's no way to DIY? I have my regularly scheduled service on September 8th, the first possible day they could fit me in for the 12k. I think I'll call them and see if they'll fix this sooner. I like to be seen on the road.

No one is smarter than all of us.

Thanks,

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post #7 of 40 (permalink) Old Aug 8th, 2006, 8:04 am
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There is a screw on the left side of the frame near the top of the radiator where I put a ground for my PIAA's. You might access it and run a seperate ground to your headlight. I would check for other damage (due to heat) to other wires in the harness.

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post #8 of 40 (permalink) Old Aug 8th, 2006, 10:00 am
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Quote:
Originally Posted by Gravity

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Thanks,

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post #9 of 40 (permalink) Old Aug 8th, 2006, 10:04 am
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Quote:
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I guess there's no way to DIY? I have my regularly scheduled service on September 8th, the first possible day they could fit me in for the 12k. I think I'll call them and see if they'll fix this sooner. I like to be seen on the road.
I recall a member fixing it himself with a large gauge wire. IIRC, there were some issues with the way the wire is attached to the headlamp assembly, making it difficult to do. I think this is why my dealer replaced the entire headlamp assembly, a $400+ part!

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post #10 of 40 (permalink) Old Aug 8th, 2006, 1:58 pm Thread Starter
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hmm

I upgraded the bulbs about 3 months ago. Do you think this has anything to do with it?

I called the dealer and they haven't ever heard of this. They suggested I replace the bulbs.

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