You could be right re wires touching in steering column as I did put in some missing screws thinking it would stop the dash vibrating so much. Will have a nosey at the weekend.is there a relay switch in the steering column for the wipers as well as under the bonnet?
Found a new switch 'in stock' (broke a couple of cars nearly 10 years ago and it still surprises me how much stuff I have left!)
Fixed (I think) Next weekend Jack Frost Rally will prove it either way
Croft Sunday 19th