Perhaps surprisingly I haven't found them deviate from wiring colour convention much at all Graham especially with older models. Of course the juries out if user mods/additions have been made.

Regarding switch positions found this image of 1994 Plus 8 showing I think, Spot, Blower, Hazard, Rear fog and Main light switch locations left to right.

[Linked Image]

Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone