Servus, I have installed a little new music in my vehicle. Radio, door speakers, and there should be new tweeters in the train as well. Now I have just briefly connected the things for a test… but music is not doing anything at all. I only get the “Beep”…. “Beep” over it again, which I get to hear as “control tones” from the radio menu. Did I connect something wrong?? The car already has an ISO connection, as well as the new radio. I had to Only replace the ignition plus cable, because with the accessoriesRadio would otherwise be the storage every time away. Ahja: Even the factory-side tweeters do not give (as far as I get it with) any sounds of themselves.