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Old March 14th, 2012, 11:05 AM   #1
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Front Brake Switch Doesn't Light Tail Light

So I inspected my front brake switch today and I was sad to find out that the taillight does not light when the brake is applied . The bike has less than 1000 miles and it already has a problem.

Anyway, I checked the rear brake, and it lights the tail light just fine. How would I go about fixing the problem with the front brake light switch?

Thanks for the help!
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Old March 14th, 2012, 11:11 AM   #2
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Check to see if it's plugged in. Also check the connection and make sure it's not corroded either.
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Old March 14th, 2012, 11:19 AM   #3
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Check to see if it's plugged in. Also check the connection and make sure it's not corroded either.
Everything is plugged in. I did adjust something just now and the light works. Although its intermittent. Where is the connection located? I did notice some rusting under the handle near the front brake fluid reservoir. Is that where the switch is located?
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Old March 14th, 2012, 11:27 AM   #4
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Nevermind, I found where the switch is located. It appears to be in good working order, making a clicking noise whenever I toggle it. I moved some of the wires leading from the brake to the rear of the bike and it appeared to alleviate the problem. I am afraid I may have a loose connection somewhere but I dont know where.
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Old March 14th, 2012, 11:28 AM   #5
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I have a 650R, but the design should be similar. This is a picture of the underside of my right handlebar. The arrow is pointing to the brake switch. Make sure it isn't sticking. If it moves freely and is plugged in, it may be faulty.
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Old March 14th, 2012, 11:36 AM   #6
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Ok so the problem lies at the connection that is directly beneath the front brake fluid reservoir. For whatever reason, this connection is not tight and is causing the intermittent issue. The black covering protecting the actual wiring is hard to remove, but I was able to peek inside and I noticed copper wire had a clean connection to the metal on the brake lever.

I am wondering if there is a lose connection at the L-Joint which I could not fully see because of the covering. I will ride along and see if my adjustments to the connection fixed the issue, which it has at the moment. Thanks for the help cuong!
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Old March 14th, 2012, 11:37 AM   #7
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Yup, same design on the 250. That part moves freely. It is just the connection leading from the lever that is causing the issue.
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Old October 24th, 2012, 09:44 AM   #8
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im having this same problem. going to check it out after work. how did you manage to look under the black rubber pieces..they are so tightly nestled behind everything!
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Old October 26th, 2012, 01:42 AM   #9
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I just noticed this on my weekly all over checks, i'll see to this when I get home from work, annoying!
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Old October 26th, 2012, 05:17 AM   #10
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I think my switch went bad..but I'm not sure. Is it supposed to turn the brake light off when the little plastic knobby piece is fully decompressed (brake all the way pulled in)? Anybody know?
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Old January 19th, 2013, 12:26 AM   #11
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did anyone find a solution to this one? im having the same problem with mine, just noticed it today.

The front break doesnt light the break light, and the back break lights the break light only when i push kinda hard on the break.

any additional info would be great!
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Old January 19th, 2013, 04:04 AM   #12
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Originally Posted by SamBizzler View Post
did anyone find a solution to this one? im having the same problem with mine, just noticed it today.

The front break doesnt light the break light, and the back break lights the break light only when i push kinda hard on the break.

any additional info would be great!
I sprayed muck off on the switch, left it for a bit, hosed it off and it worked, I think it got dust clogged.
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Old January 19th, 2013, 05:58 AM   #13
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Originally Posted by Miles_Prower View Post
I think my switch went bad..but I'm not sure. Is it supposed to turn the brake light off when the little plastic knobby piece is fully decompressed (brake all the way pulled in)? Anybody know?
Yes, it is a simple switch: on and off.

Check this link about connections:

http://faq.ninja250.org/wiki/Waterpr...al_connections
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Old January 19th, 2013, 10:26 AM   #14
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Originally Posted by Joshorilla View Post
I sprayed muck off on the switch, left it for a bit, hosed it off and it worked, I think it got dust clogged.

Sprayed the muck off with what? Wd40? Thanks.
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Old January 19th, 2013, 10:56 AM   #15
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Sprayed the muck off with what? Wd40? Thanks.
muck off is a product for cleaning bikes.



The problem was too much WD-40 I think, retained the gunk.
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Old January 19th, 2013, 11:11 AM   #16
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Oh ok, thanks
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Old January 19th, 2013, 11:30 AM   #17
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Quote:
Originally Posted by SamBizzler View Post
did anyone find a solution to this one? im having the same problem with mine, just noticed it today.

The front break doesnt light the break light, and the back break lights the break light only when i push kinda hard on the break.

any additional info would be great!
The rear brake has a switch that can be adjusted, there is a bolt that can be used to adjust it's responsiveness.

It's the piece with the red arrow pointing at it, I don't have a pic of it from the side of the bike, but the one with the footpeg hanger off should give you an idea of where it is & how the switch works.
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Old January 19th, 2013, 02:14 PM   #18
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nice, ill go ahead and adjust my back brake. thanks for the info and picture.

But, checking my front brake, it looks like the button isnt getting stuck it freely presses in and comes back out and clicks also but doesnt activate the light. so its either the connection, fuse, or faulty part then correct?

where is the connection located for the front brake? is it under the gas tank?
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Old January 19th, 2013, 04:45 PM   #19
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figured it out...

There is a two prong plug connected to the box with the brake light button, i pulled them off and noticed they were corroded, i squeezed a small piece of sand paper under there and scraped off the corrosion untill i saw the shine of the metal, pluged it back in and it worked.

I also adjusted the back brake light sensor screw, and now I have working front and back brake lights.
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Old January 30th, 2013, 07:06 PM   #20
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my switch actually melted down competely, going to get it fixed under warranty in march when i get my bike back up here
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