I've got a temp gauge ready to go on, and have the speedo out.
I was expecting to see a green wire with a sticker on it saying "ME! You want me!" but instead theres approximately 2 or 3 million green wires there coming out the back of the speedo
Actually, I used that one, and just after I switch on the gauge moves on to C which is a good sign! Will drive into town just now, hopefully it will move into the middle at some point. Of course, it could be completely wrong !!!