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Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

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Old 11-05-2009, 03:14 PM   #1
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BRAKE light on dash won't turn off

Don't know how it happened, but I can't figure out how to shut it off. My emergency brake is not hooked up (a little dangerous, I know). I am not very electric-savvy so any suggestions would be appreciated.
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Old 11-05-2009, 04:03 PM   #2
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Broke Light

If the feel of the hydraulic brakes is OK then one of the switches might be closed position when it should be open.

Take a look at the parking brake switch first because it’s easier to get to.

If it’s OK you can disconnect the wire to the hydraulic warning switch and see if the light goes out. Don’t forget to reconnect it when you’re finished.


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Old 11-05-2009, 05:06 PM   #3
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Re: BRAKE light on dash won't turn off

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Originally Posted by IROC-Zach28 View Post
Don't know how it happened, but I can't figure out how to shut it off. My emergency brake is not hooked up (a little dangerous, I know). I am not very electric-savvy so any suggestions would be appreciated.
When the parking brake light comes on without the parking brake it is a signal of pad wear or brake problems. This is per the original owners manual.
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Old 11-05-2009, 05:44 PM   #4
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Re: BRAKE light on dash won't turn off

also check to see if your brakefluid is low
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Old 11-05-2009, 06:19 PM   #5
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Re: BRAKE light on dash won't turn off

there should be a sensor on the prop valve, you'll see it under the brake fluid reservoir, check to make sure that wire/sensor isn't loose
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Old 11-05-2009, 08:29 PM   #6
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Re: BRAKE light on dash won't turn off

Thanks guys, I will see what I can do to figure it out. I just replaced the power booster not too long ago, but when I press down on the brake pedal it doesn't feel like the pressure is high enough. I admit that it stops better though when I get the pedal down.

Oh and also, the light had shut off for a few days, but then came back on. ???
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Old 11-05-2009, 09:08 PM   #7
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Re: BRAKE light on dash won't turn off

sounds like it could be something loose...
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Old 11-06-2009, 07:43 AM   #8
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Re: BRAKE light on dash won't turn off

The switch on the prop valve will ground when there is bias front to rear in the hydraulic system. If you disconnect the wire and the light goes out, reconnect it and the lamp lights and check continuity to ground at the wire connector then the lamp is doing as it should and warning you of a hydraulic problem in your system. Either air is trapped or fluid is leaking after the prop valve.

When you replaced the booster was there any chance that the master ran low on fluid? Is it low now?
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Old 11-06-2009, 02:56 PM   #9
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Re: BRAKE light on dash won't turn off

There is plenty of fluid. Where is the wire located?
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Old 11-06-2009, 03:00 PM   #10
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Re: BRAKE light on dash won't turn off

The brake sensor wire is attached to the center of the prop valve, directly underneath the MC.
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Old 11-06-2009, 03:00 PM
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