Still no headlights - I must be getting closer.....
The wheel came off - It was VERY tight and I bent the puller (1/4in steel plate) in the process, but I won. Then a nice surprise - the switch is OK! I had expected to see it burnt out, but it tests fine. The spooky bit is that the fault is in the wire (blue) between the two switches. Wiring diagram shows a direct connection, connector plugs are OK. I should be holding both ends of the same wire, but there is no connectivity between the two. Alas the wiring disappears behind the dashboard, looks like that comes off next!
This is a bit weird I reckon - anyone want to venture advice or opinion? I suppose I could just bypass it with another bit of wire, but it has me intrigued and I want to find the problem.

