What a tedious arse to get to handbrake switch.
What an even more tedious arse getting it back in.
Right, so with both brake fluid sensor unplugged and handbrake switch unplugged, light should not be on?
If I measure between the connector where wire clips on to handbrake switch and 0v, I get between 47 and 69 ohms. Does seem to vary, its either 47 or 69, no middle ground.
If I remove instruments, this goes open circuit. To me that would imply faulty instrument panel?
Fortunately, Mr Gixer turned up with a spare (albeit faulty, but different fault) instrument panel. Initially seemed OK (as did mine briefly), but after a short drive, same fault
Connector looks OK as far as I can tell.
I'm desperately running low on ideas now