Had a problem with the rear windscreen wiper today. It stayed on intermittent no matter what I did. I stopped a couple of times with the engine off and then restarted - no change. Decided I would get home, call the Ford garage and get it fixed. Finally, I discovered a short term fix. Seems if I put the bloody switch in the off position instead of the bloody intermittent position it stays still. Nice trick. If any other old farts have the same problem feel free to make a note.