The Stereo in now in a Vauxhall Astra but I can't see that that would have any bearing?
Originally the always positive and the switched positive feed to the stereo were the wrong way round - I've changed them now (the stereo can only be used with ignition in position 2 now) which I believe is correct.
However I just tried leaving the stereo off last night (now that it has the correct positive feed) and switched it on with the ignition on 2 but still no joy....
I assume the stereo should be on with the ignition on for 32 minutes ?
Hmmm