Aidanzokia Posted October 11, 2023 Posted October 11, 2023 Hey guys, I’m trying to upgrade my old stereo system in my Audi A4 B6. I’ve bought the compatible harness for it and it didn’t work. After some research, I saw that it needed to be hooked up to the fuse box. Is anyone able to make sense of what wire needs connecting to the fuse box? Thanks! Stereo.zip
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