[s-cars] Re 95 S6 Brake light

[Tom Green]

The wear indicator is a yellow caution symbol, Jerry.    I believe  
Dennis has a
problem with the red brake warning light, and I believe it is a  
serious problem
when the warning light comes on because you depress the pedal.

Dennis, I recommend you look at Fred's method to test the hydraulic  
booster
to see if it is operating properly.  You apparently don't have enough  
hydraulic
pressure for the brake system, so (1) the pump doesn't provide enough  
pressure,
or (2) there is a restriction in the line that prevents sufficient  
flow to produce the
required pressure, or (3) the booster bypasses so much fluid that the  
pump can't
maintain pressure, or (4) the hydraulic pressure sensor is faulty.

Check the sensor connections and/or consider just changing it-it's  
cheap.
Now, if the screens and filters are clean, the hose isn't failing  
inside and blocking
flow at an orifice, etc, the booster checks out, then the pump must  
be failing.

Try this, Dennis:  turn the engine off while moving at highway speed,  
but don't
let the key lock the ignition.  Stop the car by modulating the brake  
pressure in
a firm but not panic stop.  How soon do you run out of brake boost  
and do you
have any concern about stopping the car  if traffic required an  
immediate stop?
That is all the accumulator is designed to do-provide some reserve boost
pressure when the engine is not running, but it has to start with the  
design
system pressure.  It does not sound like your system ever reaches the  
proper
pressure.

Tom

> Date: Tue, 14 Oct 2008 11:16:36 -0600
> From: "Jerry Scott" <jerryscott at wispertel.net>
> Subject: Re: [s-cars] 95 S6 Brake light
> To: <dgraber460 at aol.com>
> Cc: s-car list <s-car-list at audifans.com>
> Message-ID: <8CDEBA1B0B874A339EFD9CD94204123D at Jerry5976>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> 	reply-type=original
>
> This could be the brake wear indicator.  If you cut off the  
> original wires
> that go to the pad sensor, they need to be shorted at the  
> connector.  Try
> unplugging the connector and cleaning the contacts, then  
> reconnecting. Make
> sure that the shorted wires are making good contact.
> Jerry
> ----- Original Message -----
> From: <dgraber460 at aol.com>
> To: <s-car-list at audifans.com>
> Sent: Monday, October 13, 2008 8:27 PM
> Subject: [s-cars] 95 S6 Brake light
>
>
>> My 95 S6 brake light issue has been getting gradually worse for  
>> about 3
>> years.
>> At first it would like many others?just not go out right away at  
>> start up.
>> That has been getting progressively longer and longer and now it  
>> is coming
>> on (off & on) during the drive.
>> I have flushed the fluid, replaced the bomb (new) and the pump.  
>> Fluid is
>> above the line stopped and running.
>> If idling in the garage and turn the wheel left to right the light  
>> will
>> comes on and go off. Use the brakes it comes on and goes off. Hit  
>> a bump
>> it comes on and goes off
>> The brakes have never given me any obvious reason to be concerned  
>> about
>> failure as they have felt the same through all of this. They don't  
>> feel
>> crisp but not as if they cold fail. The usual bomb test of pedal  
>> pumping
>> with the car off does not give a rock hard pedal after any number of
>> pumps. Never did.
>> Pads are all good and rotors are normal for their miles.
>> Equipped with G60s & drilled rotors. I would like it to feel sharp  
>> like
>> the URQ with the same equipment.
>> Any ideas? TIA
>>
>>
>> Dennis Graber
>> Denver, CO