just hooked up a sony head unit {CDX_GT350S} and the memory dont work. as in when listening to a cd then turning the car off, whe it turns back on it doesnt go back to the last reading. did i miss a wire or something? there where a couple left over i.e illumination wire and 2nd acceseries wire in the car and a light blue one and the power antenna one on the h/u. any ideas?
You will find that you missed the constant 12V wire. That provides power to your HU when car is turned off so it remembers radio stations, settings, last track, volume etc.
or you've got the constant 12v and the accessories mixed up