Hello, I bought a SC-805. The code was there and the radio was activated immediately. I then upgraded the radio to change the lighting. After that I connected the radio again. The code is no longer working and the radio is locked. How can this be? I know that I should start the ignition until again “Code” is on the display. Then I should try the code again. I have in the meantime fetched a Yatour Bluetooth adapter. Someone knows where the 12V yellow connection cable to be connected? Best regards Albert