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HM67

Warning light fault

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HM67
Spoiler

 

I have a mk4 Polo which has had a break pad warning light on for years. Break pads regularly checked and deemed good, so put down to a wiring fault. Car had cam belt replaced about a year ago, plus relatively new battery. It runs well but changes to MOT rules now include warning lights. Any suggestions on cost of sorting wiring fault, as seems a shame to scrap a good car.

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caretakerplus

Welcome to the Forum.

 

You could try disconnecting at each wheel, one at a time and see if the light goes out - or disconnect all of them and put them back one at a time and see which one puts the light back on.

Of course, this will only work if the fault is near to the brake, but it would be my first port of call.

 

Regards

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nige8021

From your description you don't have a MK4 (on this forum) as they didn't have pad wear warning, you have a 9N1/3 so either a MK6/7 as they have the pad warning system, the system looks for an open circuit to ground in either the front left and if you have rear discs? then the right rear, the wiring from the front pads is the most common one to break, if you follow the wiring back into the engine bay and cut it open and short the RED wire to ground and see if that puts the light out

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HM67

Hi  Nige. Thanks for your advise. It is a 2002 model polo

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HM67
2 hours ago, caretakerplus said:

Welcome to the Forum.

 

You could try disconnecting at each wheel, one at a time and see if the light goes out - or disconnect all of them and put them back one at a time and see which one puts the light back on.

Of course, this will only work if the fault is near to the brake, but it would be my first port of call.

 

Regards

 

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HM67

Thanks for the tip

 

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nige8021

So it's a 9N1 and a MK6 as far as this forum, but if you say a 9N1 everyone will know what you have 🙂

 

If your not bothered about having the warning for low pads and your going to regularly check them for wear, you could remove the speedo unit from the dash and on the 8 pin Black connector pin 1 is a Yellow wire or Red/yellow if you have rear drums and short that wire to ground, this will keep the light off  You might also be able to re-program the speedo unit with VCDS to delete the pad warning 

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