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1999 Audi A6 Quattro 2.8L Automatic 100k miles Brake Light Blinking and ABS solid

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Old Jan 18, 2009 | 09:40 AM
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Default 1999 Audi A6 Quattro 2.8L Automatic 100k miles Brake Light Blinking and ABS solid

The Brake Light was blinking and ABS was solid so I changed my front brake pads rotors and sensors. I noticed the front driver side sensor was cut so I had to rewire the sensor by hand.

After replacing these my brake light is blinking and ABS is solid. When I first start the car it beeps 3 times.


When I try to run a VAG-COM on the ABS and Brakes I get a error. Although I do get this message

Address 02: Auto Trans
Controller: 4B0 927 156 G
Component: AG5 01V 2.8l5V USA 8509
Coding: 00000
Shop #: WSC 00000
1 Fault Found:
00526 - Brake Light Switch-F
27-00 - Implausible Signal

Could a faulty brake light switch cause both the ABS and Brake light to appear?

Any other suggestions on this?
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Old Jan 18, 2009 | 09:48 AM
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Default STFA would get you the answer quickly, but...

...I'll save you the effort:
Have BBA or Module Master repair the ABS control unit.
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Old Jan 18, 2009 | 09:50 AM
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Default how certain that thats the part?

the brake light switch wont cause that?
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Old Jan 18, 2009 | 09:56 AM
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Default STFA.

Don't trust just me.
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Old Jan 18, 2009 | 09:58 AM
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Default i am reading both. some posts are saying it could be the brake light switch others are saying abs

control module.

but i couldnt really find a post that will suggest to test even further other than buying a brake light switch.
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Old Jan 18, 2009 | 10:02 AM
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Default

Are you finding posts where a bad switch kicked on both the ABS and brake lights?
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Old Jan 18, 2009 | 10:04 AM
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Default

yes
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Old Jan 18, 2009 | 11:24 AM
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Default Re: Check brake fluid it will also set of the brake warning beep

my bad brake switch was showing traction control icon and esp light not sure about abs showing, does your car have a loss of power mine did when it was the brake switch.
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Old Jan 18, 2009 | 11:28 AM
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brake fluid is fine and i am not losing any power
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Old Jan 18, 2009 | 01:19 PM
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Default Re: Ok i would replace the brake light switch its cheap $20.00 start from there

seems that a bad switch can set of all kinds of brake problem lights start with the switch and see how it goes.
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