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      05-17-2021, 11:00 PM   #12
InnerBlueSkies's Avatar

Drives: 2008 E90 M3
Join Date: Sep 2014
Location: College Station, Texas

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Originally Posted by Shall76 View Post
I had a similar issue where I couldn't get the audio working either. Instruction manuals were garbage.

I also have a CCC idrive with the individual audio upgrade btw.

So it turns out you need to remove the OEM fiber optic cable from the OEM wiring harness and plug it into the Xtrons female harness that goes into the back of the DVD/CD drive.

THEN you need to unplug the female "Audio out" on the Xtrons and use the male aux cable provided to run it to your aux input in your armrest.

Oddly even though I have the upgraded logic 7/individual audio, I DIDNT need to run that decoder box for audio.

To make sure the display screen isn't faulty, they said to run headphones to the "audio out" and make sure sound plays from it.

There's also a possibility they gave you the wrong wiring harness, mines was labeled KJD-7200-01.
Spot on, excellent advice.
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