JackRWB

You see, I don't get it, why Audi makes such a top secret of relays set up. I've searched "a whole internet" and no success so far.

and here is the video of my issue https://photos.app.goo.gl/uzqtzt5b3Y1BFHmw9

On 1/10/2023 at 11:48 PM, BlackAudi said:

Hey guys,

my 2016 c7.5 had been suffering the same crazy ‘Christmas lights’ symptoms for more than a year. Changed 3 speed sensors, steering column (had free play anyway) yet it persisted.

Finally decided to try changing speed sensors cables (dame there’s lots of stripping works😅) and it’s all good now.

Hi. Did you have any error codes related to speed sensor malfunction? 

My car is A6 Allroad Quattro 3.0 V6 Bi Turbo 313BHP 2014 engine code CGQB

I have the same issue. Christmas light and !Removed! annoying beeping. I tried almost everything. I've bought a new battery and off eBay a used ABS pump with module and I swapped it. Still all the errors come back. 
I've bought a new ABS/Speed sensor and plugged it in both sides to see if anything changed. No success. Now I'm waiting for a brake light switch as I read it can cause lots of trouble but I have no errors related to switch.
My ABS module simply loses communication and the computer cannot discover its presence. The interesting fact is that when I disconnect the ABS module plug and connect it again, then for a few minutes or seconds (always a surprise when) it gets back communication and I can read the codes related to lost communication with ABS module.
Does anybody have any idea what could be faulty? Is there a relay that might play with me or maybe the unit from eBay is also broken? I've never had any DTC related to bad sensor, bad wiring or anything like this. I'm utterly fed up.

Hey Steve. Do you have, by any chance, diagram for relays? I can't find a decent description where is which relay. I'm looking for ABS relays and can't find the answer.