Check out the multi-plug to the ABS unit under the battery, particularly if you have had a lot of water lately.
See my catastrophe last year at
http://www.the75andztclub.co.uk/foru...t=abs+traction
and at
http://www.the75andztclub.co.uk/foru...t=abs+traction.
do a search in the Technical Help forum for ABS Traction that might help.
In the end I managed to obtain a new loom with plug and a new ABS unit, trouble is now I am having a problem bleeding the system - it goes on .....