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Brake light comes on intermittently

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Old Nov 5, 2013 | 10:20 AM
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Default Brake light comes on intermittently

Recently my brake light on the cluster keeps coming on. Its intermittent, but from researching it seems to point to low brake fluid. I just had my wheels put on and the shop said the brakes were ok, still plenty of wear left.

That being said, which brake fluid can I use with the existing stuff in there? Ive looked at these, but not sure if there is something better?


ATE 706202 Original TYP 200 DOT 4 Brake Fluid - 1 Liter
Amazon.com: ATE 706202 Original TYP 200 DOT 4 Brake Fluid - 1 Liter: Automotive Amazon.com: ATE 706202 Original TYP 200 DOT 4 Brake Fluid - 1 Liter: Automotive

Castrol GT LMA Brake Fluid - 32oz. 12504
Amazon.com: Castrol GT LMA Brake Fluid - 32oz. 12504: Automotive Amazon.com: Castrol GT LMA Brake Fluid - 32oz. 12504: Automotive
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Old Nov 5, 2013 | 10:24 AM
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Originally Posted by Loyalone72
Recently my brake light on the cluster keeps coming on. Its intermittent, but from researching it seems to point to low brake fluid. I just had my wheels put on and the shop said the brakes were ok, still plenty of wear left.

That being said, which brake fluid can I use with the existing stuff in there? Ive looked at these, but not sure if there is something better?


ATE 706202 Original TYP 200 DOT 4 Brake Fluid - 1 Liter
Amazon.com: ATE 706202 Original TYP 200 DOT 4 Brake Fluid - 1 Liter: Automotive

Castrol GT LMA Brake Fluid - 32oz. 12504
Amazon.com: Castrol GT LMA Brake Fluid - 32oz. 12504: Automotive
Look at the Cap man!!! DOT4 really?
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Old Nov 5, 2013 | 10:24 AM
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That means u have a malfunctioning bulb, has nothing to do with brake fluid...
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Old Nov 5, 2013 | 10:26 AM
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Some of you guys just gotta use common sense.. Its not special skills or anything..
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Old Nov 5, 2013 | 10:28 AM
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Originally Posted by FlockoV8
That means u have a malfunctioning bulb, has nothing to do with brake fluid...
Hey Flocko

If his BMC fluid is low it will trigger the brake light on the cluster, it usually does it when taking sharp turns since the fluid goes to one side and the sensor picks it up.
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Old Nov 5, 2013 | 10:30 AM
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Originally Posted by Loyalone72
Recently my brake light on the cluster keeps coming on. Its intermittent, but from researching it seems to point to low brake fluid. I just had my wheels put on and the shop said the brakes were ok, still plenty of wear left.

That being said, which brake fluid can I use with the existing stuff in there? Ive looked at these, but not sure if there is something better?


ATE 706202 Original TYP 200 DOT 4 Brake Fluid - 1 Liter
Amazon.com: ATE 706202 Original TYP 200 DOT 4 Brake Fluid - 1 Liter: Automotive

Castrol GT LMA Brake Fluid - 32oz. 12504
Amazon.com: Castrol GT LMA Brake Fluid - 32oz. 12504: Automotive
Before doing all this, have you ACTUALLY looked at the brake fluid reservoir under the hood and made sure it's somewhere above the MINIMUM mark? If the tank's a bit low but above the minimum level, that's OK because as your brakes wear thinner, the fluid runs down a little further into the system to take up the slack.
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Old Nov 5, 2013 | 10:41 AM
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Originally Posted by FlockoV8
That means u have a malfunctioning bulb, has nothing to do with brake fluid...
Thank you Floko. I will check the bulbs. I sure appreciate it.

Btw, if it stays on after I find the malfunctioning bulb, can it be reset by disconnecting the battery?
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Old Nov 5, 2013 | 10:45 AM
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Originally Posted by Sampak
Before doing all this, have you ACTUALLY looked at the brake fluid reservoir under the hood and made sure it's somewhere above the MINIMUM mark? If the tank's a bit low but above the minimum level, that's OK because as your brakes wear thinner, the fluid runs down a little further into the system to take up the slack.
Thank you Sampak.

I checked the brake fluid level and it is just a smidge above the min line but well below the max line.
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Old Nov 5, 2013 | 10:47 AM
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Originally Posted by ****-adkt
Hey Flocko

If his BMC fluid is low it will trigger the brake light on the cluster, it usually does it when taking sharp turns since the fluid goes to one side and the sensor picks it up.
Thank you ****-adkt, I think this is exaclty whats happening. It comes on and off at random times when driving.
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Old Nov 5, 2013 | 10:48 AM
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Originally Posted by Loyalone72
Thank you Sampak.

I checked the brake fluid level and it is just a smidge above the min line but well below the max line.
Ok, in that case topping off the fluid just a little bit (but don't go to the MAX line, or it'll just overflow when you do replace in new rotors/pads) might help get rid of one of the potential causes, from what it sounds like.
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Old Nov 5, 2013 | 10:57 AM
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Great idea...thank you Sampak. I just learned somethin! I will do that.

Do you recommend either of the two brake fluids in my original post?
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Old Nov 5, 2013 | 10:59 AM
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Originally Posted by ****-adkt
Hey Flocko

If his BMC fluid is low it will trigger the brake light on the cluster, it usually does it when taking sharp turns since the fluid goes to one side and the sensor picks it up.
Ahhh that makes sense with it intermittently flashing, I didn't know that, thanks, learn something new everyday... Opened my big mouth too soon...
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Old Nov 5, 2013 | 11:02 AM
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Originally Posted by FlockoV8
Ahhh that makes sense with it intermittently flashing, I didn't know that, thanks, learn something new everyday... Opened my big mouth too soon...
Same here... great info
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Old Nov 5, 2013 | 01:41 PM
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By the way, my low fuel light eventually comes on whenever I drive a long distance.
Any idea why this keeps happening?
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Old Nov 6, 2013 | 11:13 AM
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Originally Posted by Sampak
Ok, in that case topping off the fluid just a little bit (but don't go to the MAX line, or it'll just overflow when you do replace in new rotors/pads) might help get rid of one of the potential causes, from what it sounds like.
Do you have a recommended brake fluid brand/type for your GS? I know that the GS uses DOT3. I know you cant mix DOT5 with it but I hear that I could add DOT4 or DOT5.1.

Im not going to do a full bleed but will do that soon.

Last edited by Loyalone72; Nov 6, 2013 at 11:17 AM.
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