After “actually” error-free connection incl. ISO adapter (sponge plus and duration plus are switched correctly) the JVC simply cannot be switched on. It has power, CD can be driven out and in and when I press the disp button it shows the time elapsed since the installation. What can this be? Edit: Now it works, but how: 1. On the ISO adapter red and yellow changed 2. from the radio yellow and red both on and off red Lets always turn on and off. What else do I have to do to get this on and off by ignition?