The relay is located behind the dashboard, about the middle and is in a bank of 5, the wiper relay being the tall one on the right hand end.
If your careful you can extract the relay by reaching under the dash and pulling the relay out of it's socket.
Your hand will be a bloody mess after getting the relay having cut yourself on all the tags and screws!
Graham, it certainly points to the relay holding on but no shorts are apparent.
It's very difficult to take it any further without dismantling the dash, which I'm loath to do.
I may have to live with the fault and pull over like I did on the M4 onto the hardshoulder and extract the relay.
The joys of Morgan motoring1
