OK I'm making some progress. Steptoe was right, I removed the ABS switch and one of the wires had come off of the switch, so I have re-soldered it and it works. So now I go through the reset procedure , hold the ABS switch in and the bottom light stays on, top one goes out. when I release the switch both stay on but when I turn the ignition off and on again the lights go back to alternate flashing. So I don't think I have managed the reset. I have the wire in the centre hole of the 3 and the other end earthed to the frame by the rear shock top bolt, I sanded a small area so I can see clean metal to earth to. Now I'm stumped again.
