On Wednesday, 2 January 2019 11:59:28 UTC, David WE Roberts (Google) wrote:

Gave up on the diagnostics and changed the valve.

Quick and simple job of replacing wires like for like in the wiring loom.

It would have been easier if the wiring loom had been more accessible.

All now working as it should be, thank $Deity.

The original valve head has been battered for some reason; will post
pictures soon (if anyone cares).

Thanks to all for the help.


Cheers


Dave R

Good. battered & fried by any chance?