Hi all, just put a single rail 4 speed from an XF in my XB coupe on the weekend - and noticed the speedo setup is electronic - with 3 wires coming out. Now this is a good thing as my speedo in the old g/box never worked at all - so what I need to know is what do the 3 wires connect to to run either an XF speedo or an aftermarket one like a Jaycar kit or similar? I'm assuming one is a pulse signal - but what are other two?

Thanks heaps!