[s-cars] Brake light staying on after start up

[Brian Armstead]

Great tips Rich/Fred.

Can you give a procedure on how to flush the hydraulic fluid?

THanks,

Brian
93 S4

Rich Assarabowski wrote:
> 
> The brake light can also be actuated by a sensor in the master cylinder,
> which often gets sluggish.  To test it, when the brake light is on
> temporarily disconnect the wires at the bottom of sensor in the master
> cylinder, if the light goes out then the problem is with the master cylinder
> or more likely just the sensor.  Like with the bomb, the light also tends to
> stay on for a few seconds after startup if it's not up to snuff.
> 
> As Fred points out, it's not a problem to be ignored, flushing the hydraulic
> fluid regularly should be on everyone's maintenance schedule.
> 
> -- Rich A.
> 
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