Hi all
Thank you all for your help, managed to get it put on a tech 2 and all is ok! Possible explanation from the guy with the machine is that it is a brand new stereo that was put in before it was sold to me and when the battery was first disconnected it had no settings so it all had to be reset on the tech 2. on another note, I told him about the forum and because of the lack of tech 2 owners darn sarf, he will think about joining the forum and possibly helping out with his tech 2 - watch this space, I will keep you informed.
again, thanks for your help

Tony