Audi CQ20V ABS problem

[M2ki]

Old diff prices start around 30€ in here, maybe it is similar there. Then easiest way would be to tell the seller, that you only want the actuator, and that he can keep the diff

[PeterS]

I mean actuator, but i cant remember on name, so i wrote pump Thank you. I looke on net for buy one actuator..New is NLA. So only used one or from audi classic, but the price is little bit out

some people have had success adapting a mercedes door lock actuator https://mercedessource.com/node/1286

[Tom_]

M2ki: i make a few topics in our country on forums and waiting for response Diff is always good to have another one

PeterS: Thank you, i ve already find some informations about Mercedes actuator P/N is 0008006975 and lot of people used it instead of VW or Audi one, with some modification

[Tom_]

shiiiiiiit ABS light shows on again....what the hell....i dont get it

[M2ki]

I have not read the whole thread, but have you tried different ABS combi relay?

[Tom_]

No i dont try...i have a thought that if it were bad ABS relay, abs lights on immediately and no after 1 or 40km... U think relay inside abs pump or just inside dashboard?

[M2ki]

Under the dashboard. 10A fuse on top and 76 written on it. These go bad also.
Take off the relay and bridge pin 2 and 6 to be sure it is not relays fault.
If you cant see the pin numbers on the socket, then its the thicker red and thicker black/blue stripe wire that needs to be connected.

[Tom_]

OK thanks mate, tomorrow i looked at it...Bridge? u mean a measure with multimeter?

[M2ki]

No, remove the relay, and connect wire from pin 2 to pin 6 in relay socket.

[Tom_]

OK now i get it...Thank you....any ideas where is located a ground wires of ABS unit?
When i connect wire from pin 2 to pin 6 ? whats gonna happend?

[M2ki]

It turns on the ABS. So you can make sure, it is not the faulty relay, cancel switch or diff lock that turns off ABS.
Ground is under the hood, near the ABS pump mounting bracket. See last pic.

[Tom_]

Thanks for the help ...i look at it today

[Tom_]

So i look at relay and fuse, and it looks fine, no problem...So i remove it, use your wire tip, and when i connect wire ABS turns off..when i remove wire ABS turns ON so i guess the relay is fine. But i noticed that ABS ground looks not so clean...Some pictures

Should be a bad abs ground doing my thing?

[M2ki]

Leave the wire and place and drive around. If ABS light turns on, then you can eliminate the relay fault.

[Tom_]

Ok, i pulled it back..So i try..but it can fall from it during driving?