its the black plug brown is the earth the one to the right of the earth will be either the ignition/always live and from memory the second cable up from the earth will be the other that needs swapping
never had the radio out but usually there is a wiring diagram on a white sticky label on the unit get a multimeter or test light and just double check them 2 cable positions mentioned above
never had the radio out but usually there is a wiring diagram on a white sticky label on the unit get a multimeter or test light and just double check them 2 cable positions mentioned above
