Hi thanks for the reply when I said control I mean't the instrument cluster I presume this is for the speed pulse?

I have a backlight on the monitor and can play cassettes and the radio but no picture.

Not sure if the Nav is coded for a colour picture bought it of ebay.

What does it mean by dead-reckoning? Could this be the problem?

I also do not have the TV tuner fitted.

Where can I get this NavCoder software from?

Thanks again