Joe,
I have re checked the stereo wiring - the antenna lead is white, not blue as most related threads suggest. The stereo does not come on when the dome light is switched on - can I eliminate this from my investigations? There is a red wire spliced into the battery (permanent 12v) lead - I am sure this is for the alarm. The violet and grey wire for stereo back lighting is not connected. Do I therefore just need to follow the door light wiring for crossfeeds?
Thanks,
John