Hello guys,

Few weeks ago I decide to replace my Audi A4 2004 "Symphony" unit with aftermarket head unit which I had from my other car. I had all kind of problems connecting rear speakers, but finally managed them working. But at the same time I found out that if I remove key from ignition, it still plays. First I thought it's something to do with how I connected the wires. I was playing with them yesterday afternoon, but couldn't sort this stuff. Then I was thinking it's something wrong it looks that power not been cut off, I thought I'll check if other things working. First I tested cigarette lighter, I tried to charge my phone, and it's charging. Then I tested windows and they also working. So I went online to search for same problem, but some people saying it's ignition switch and some saying it's load reduction relay. I would appreciate if someone could explain how best way to test this. Thank you in advance.