Fairy nuff, I think that is what I was saying I would do but maybe I
missed out the check wiring *first* then go looking for other problems.
It's unlikely I'll get a chance to look at it before the weekend so
I'll post an update after that. I think my first task will be to label
the mess of cables in situ before trying to rearrange them. I'm
generally a messy bugger but I like wiring to be neat with nice diagram
beside it to show what's going on.

Mark.