ABS warniing lamp on ... where do I start?
I've just discovered that the ABS warning lamp on my urS4 had been 'doctored' at some time in the past. The relevant bulb-holder had been twisted in its' mount just enough to prevent it from coming on. And guess what! ..... once on ... it stays on! There's a fault somewhere.
Where do I start to unravel the problem?
Re: ABS warniing lamp on ... where do I start?
Get a VAG-COM from www.vag-com.co.uk to identify where the fault lies - VAG-COM will tell you if a sensor is faulty and which one it is!
You can then trace back from there - usually you can pull the ABS sensor from the upright, clean it and replace it.
May even be simpler!