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  1. Brake warning light 
    #1
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    I knew my front pads were low and recently the warning light came on. I booked the car into my local Indy who changed the pads and while they were at it, I had the discs done too. All back together and the warning light remains on. No VCDS fault codes, the brake fluid is at the right level and I checked their work and it’s all ok (warning wire connected).

    They said on the A6s they have recently seen an issue with the with the wiring harness being corroded and failing. I find this odd as the light cane on at the correct time as the wire wire through.

    Anyone know what the issue may be?


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  2. Re: Brake warning light 
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    It is very easy to route the wire incorrectly and have it cut or worn though by the rotating parts. The pad warning system is not liked to the diagnostics as it is a simple closed circuit checker.
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  3. Re: Brake warning light 
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    I’ll have another check. All looked good to me when I took the wheels off yesterday when putting the summer set back on.

    Just strange it appeared with the genuine low pads but now not disappeared


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  4. Re: Brake warning light 
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    Did they replace the sensor? Normally once the sensor has been triggered it’s pretty much buggered. Sensors are fairly cheap and some pads comes with them.
     
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  5. Re: Brake warning light 
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    Yeah it’s a brand new looking sensor. Suppose I could multimeter test it?


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  6. Re: Brake warning light 
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    Some Audi’s/vw were bad for corrosion in the plugs/terminals. Might need a squirt of wd40 or something to clean it up.
     
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  7. Re: Brake warning light 
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    Quote Originally Posted by M1tchy View Post
    I knew my front pads were low and recently the warning light came on. I booked the car into my local Indy who changed the pads and while they were at it, I had the discs done too. All back together and the warning light remains on. No VCDS fault codes, the brake fluid is at the right level and I checked their work and it’s all ok (warning wire connected).

    They said on the A6s they have recently seen an issue with the with the wiring harness being corroded and failing. I find this odd as the light cane on at the correct time as the wire wire through.

    Anyone know what the issue may be?


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    Guessing u ruled out the obvious next? - the rear brakes also have a sensor


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  8. Re: Brake warning light 
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    When the sensor shorts and illuminates the warning light, is it because it is in contact with the disc or is it because the sensor wears as a result of rubbing against the disc and is therefore closed circuit.
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  9. Re: Brake warning light 
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    Yeah it’s not the rears, I had them done 6 months ago. I’ll check it with a multimeter later and see how the contacts look.


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  10. Re: Brake warning light 
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    Quote Originally Posted by shabazmo View Post
    When the sensor shorts and illuminates the warning light, is it because it is in contact with the disc or is it because the sensor wears as a result of rubbing against the disc and is therefore closed circuit.
    It is a closed circuit until the sensor wears through and breaks the circuit which is why a broken wire brings the light on.
    Last edited by Crasher; 10-04-2018 at 12:00 AM.
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