I've moved your thread to the correct forum, please have a read of the forum rules regarding posting in the correct sections
http://www.bimmerforums.co.uk/forum/...delines-t1603/, the BMW Guides and How To's section is for guides for people to follow, like a cook book :hihi
Regarding your problem, the pad sensors won't affect the ABS, you will most likely have a failed wheel speed sensor or worse case a failed ABS pump, you will be best to get the ABS codes read at a good BMW specialists or good indy.
If you did want to try fault finding the problem then the ABS wheel speed sensors should measure approx 1000 - 1100 ohms at the sensor plug