Cheers Paul & Kev!!
It's a 12v by the way, pretty sure general service, forgot that bit (should have known better)...
I have 'found' a wiring diagram on the internet, I've also since had a message back, could be a loose connection - he had electrics for about 5 mins until he started the engine. Gonna be fun to find I reckon, hopefully will see something dangling - well, live in hope eh.