well here is another cause for the lights to come on, before Xmas the lights would come on when I would be reversing out of the drive and turning onto road it is a steep drive and there was always a loud clunk clunk from the rear because the car would rock from side to side.

I had pretty much guessed the two issues were related as could not find any fault with the ABS, would clear faults and all good till the next reverse trip down drive.

So started looking for the cause of the noise as I was leaning towards the theory this was inducing a false signal into the speed sensors at the rear (how I do not know but a ocillascope would have proved that theory one way or the other).

Replaced three sway bar link rods two were badly worn one on its way, this made the clunk clunk noise not as bad but did not remove problem, it was a few weeks before I could go hunting for the problem again when I did with the help of someone rocking the disco there was movement in the watts linkage on the back of the diff.

So replaced the three bearings noise now gone and cleared the faults and the three Amigoes are now gone and have not been back for two weeks, anyone out there with a different theory as to why apart from the one I noted above??