There are three wires into a plug coming from the side of the gearbox,1 black, 1 brown and 1 yellow. I know that these are for a speedo drive and this is what I had planned to use. Am I right in thinking that the brown would be the + feed, the black would be the - and the yellow is the signal to the speedo? Just need to confirm it before I connect it all up!
Thanks .
john.

as far as i am aware brown and black are the other way round brown tends to be earth on fords ie black live but could be wrong

On my MT75 the speedo drive is mechanical....i.e. a cable drive, the electronic device with the 3 wires is for speed sensor to the ECU. Or have I got that wrong, but I have the cable and the connection on my gearbox which is definitely a MT75.

Regards
Bob

My MTX75 has only got the speed sensor (didn't know it had a cable too) and I used it to feed the Evodash.
My connections are:

Brown - Ground
Black/brown - +ve
Yellow/brown - Signal

thanks all thats great.
john