Hi everyone. Newbie here. lol I just got a 2002 TT Quattro. When the key is inserted and in the acc, the radio plays fine. When I turn on the car, the sound from the speakers gets cut off, but the radio is on. When I try to lower or raise the window or turn on the lights, the sound comes on and shuts off immediately. Can someone please help me with this? I'd really appreciate it. Thanks in advance!

Frank