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Old 09-24-2004, 11:45 AM   #1
losercharles OP
it's just a rash
 
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Joined: Jun 2004
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Brake Failure light likes to flicker on

Today, I notice that my brake failure light started to flicker. COuld this be due to low fluid level? What causes the light to actually come on? I hate that brake fluid is hidden underneath the tank ('76 r/90) Any suggestions on what I should break first to fix the brake?

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Old 09-24-2004, 12:39 PM   #2
SOLO LOBO
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my guess...

Pull the tank and check the brake fluid level...then promptly throw away the under-the-tank master cylinder and replace with the later kind that mounts on your bars!
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Old 09-24-2004, 01:23 PM   #3
Eurobiker
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Not Guessing.....

The terminals on the cap are prolly shorting to the tank creating your flicker. Pull the tank and insulate the connectors with silicone, electrical or duct tape. Total repair cost, $.10 plus the you now owe me. As long as your in there though, I'd change the brake fluid and bleed the system if this hasn't been done in the past 2 years. Make that 2
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Old 09-24-2004, 01:56 PM   #4
racer
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grounding

Sounds like a grounding problem.
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Old 09-24-2004, 03:10 PM   #5
Flash
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There's a float underneath the brake reservoir cap. Fluid level goes down, float sinks, closes circuit, light comes on.

Flickering light? As stated before, check the fluid level. If OK, then disconnect the two wires and tape them out of the way. Reinstall tank and go for a ride. If flickering stops, you've got a bad cap. Most likely problem.

If the flickering ontinues, you've got a short elsewhere.

My 78 R100S does it too. And the culprit is the rear master cylinder cap. To get a new cap, I have to buy the whole reservoir.

I should have enough saved by New Year's.
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Old 09-27-2004, 12:06 PM   #6
losercharles OP
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Quote:
Originally Posted by Flash

I should have enough saved by New Year's.
Ouch, dude.... So with that said it's probably just best to convert to a later handle bar mount. Some old fella who works on BMWs says that I could just slap a Suzuki Master Cylinder on it, but then I fear I may have to start pulling 60 mph wheelies and perform stoppies on my new squidmobile... only time will tell!


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