http://youtu.be/lwx2ce_AyOEOriginally Posted by Lucifer
But on a serious note, you can buy a hand held ocsillosope from Maplin or the likes and connect it up to the ABS sensors and go for a drive.
You will need the pin-out diagram for the ABS controller so you can connect into the back of the wiring will its all still connected so you can go for a drive.
http://www.bmw-driver.net/forum/showpost.php?p=170569&postcount=10