Not sure if I followed you properly but you need a constant supply as well as a switched supply, Ive just fitted an all singing/dancing Sony unit to my Plus8 -1999), everything worked fine on the drive but when I took the car out I lost the DAB, I suspect this is because i have had to use a separate windscreen mounted Ariel for the DAB & I think the heated windscreen must be blocking the signal so any advice on alternative aerials would be welcome.
On a second point,I am also looking to change out the speakers , which I'm really struggling with , these are cheapo Realistic speakers ( supplied with the car) which fit into a 110mm hole , but the depth is only 32mm, and i don't want to fit spacers unless there is no option so if anyone has went through a similar exercise i would be grateful( again ) for any pointers as to what is available
Ta