Don't panic... First thing to do is (find) check and clean all your grounds (earths?). There is one in particular in the area of the driver's side head light (It's been a while so I can't be exact, and my two D2's were in a different places). Loss of this ground will cause havoc with the anti-lock. Find the ground and clean well, I always put metallic anti-seize on ground connections to prevent any further corrosion and give a good connection. Anti-seize also works well preventing corrosion on the battery posts. Oh, I have both a '99 and a '03 D2, so been there done that. Also try 'Discoweb' a little more specialized on Discos.