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<  General Scootering  ~  brake light switch???
jsyx
PostPosted: Mon Apr 03, 2006 12:18 pm  Reply with quote
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i have some kind of short in my brake light switch (front). Must be condensation inside, cos' the brake light stays on. If i wiggle the lever and push it away from the handlebars, it will turn off, but then when i pull it again, it just stays on. This problem started last summer and is probably a result of my "storage situation."
Do you think it will work out on it's own or should i just replace the switch? Someone recommended spraying some WD-40 into the switch to get the moisture out?

any thoughts?

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nate
PostPosted: Mon Apr 03, 2006 12:30 pm  Reply with quote
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It almost sounds like the front brake cable is a little too snug- but I just realized that I have no idea as to what the brake switch connection looks like on a disc/hydraulic setup. So now this turns into a question session for me:

On a cable setup, you've just got the cable running down the headset and fork to the brake pinchbolt. That expands the shoes when you pull on them. The inner essentially runs through two segments of 'outer' cables- one from the lever to the light switch, and then the second segment seats in the brake switch to the front brake assembly. Pulling on the lever pulls the whole assembly snug, which triggers the light.

With a Disc setup, you've got the cable running to a hydraulic piston, which is connected to the shoes and resevoir. Where does the cable/hydraulic conversion take place?
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Tom Lindsay
PostPosted: Mon Apr 03, 2006 12:39 pm  Reply with quote
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Was Josh's PX converted to a disc, or was it originally one? The original discs have the reservoir on the handlebars, and there is no cable. I bet his is a conversion though...

Never mind, I'm feeling stupid. Josh rides a PX125, and they were never available in the US with discs. Sorry to sound daft...

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Matty
PostPosted: Mon Apr 03, 2006 12:43 pm  Reply with quote
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Josh has a Stella, though it's beat down enough to pass as a P-series.

From memory I think there is a pressure switch/button thing that the lever hits right on the resevoir. Quick someone run out and look at their Stella. Yeah no cable on the Stella front brake line.

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nate
PostPosted: Mon Apr 03, 2006 2:03 pm  Reply with quote
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Most conversions seem to have the remote master cylinder, which sits down by the brake. that still relies on a front cable all the way down the fork.

Factory standard disc brakes have the reservoir in the headset, with hydraulic line down to the brake.
If there's no cable on the stella brake lever, how is the lever connected to the master cylinder, and how is that related to the brake light?

I never really thought about it before, but now I'm intrigued.

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Tom Lindsay
PostPosted: Mon Apr 03, 2006 2:15 pm  Reply with quote
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There's a little nub on the brake lever that pushes into the master cylinder to actuate the brake. Quite simple - as far as I can tell, the lever is not actually *attached* to the master cylinder/reservoir assembly. Fewer parts to break that way, I guess.

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jsyx
PostPosted: Mon Apr 03, 2006 2:22 pm  Reply with quote
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so do you think bleeding a little hydraulic fluid out may solve the issue?

i've got room for days on the lever. that thing locks up real quick...
quite the opposite of any P-series...

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some_dude
PostPosted: Mon Apr 03, 2006 2:26 pm  Reply with quote
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Matty wrote:
Quick someone run out and look at their Stella. Yeah no cable on the Stella front brake line.


I did not know you had a Stella to use as a reference.
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My Pal Foot Foot
PostPosted: Mon Apr 03, 2006 9:31 pm  Reply with quote
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Don't go bleeding before you tighten the switch back into the headset. It can sometimes come loose. Pull off the 2 wires and clean them. See if that helps. But it does sound like your brakes do need some bleeding though.
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jsyx
PostPosted: Tue Apr 04, 2006 10:59 am  Reply with quote
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so if this ever happens again:

-remove and clean 2 wires leading to brake light. (located where the cable would come out of a p-series.)
-unthread brake light switch from lever, clean out salt, corrosion etc. (WD40)
-reassemble, rock and roll.

the switch is in a totally different place than a P. Now i know, and knowing is half the battle...

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