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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > DIY Guides > Does anyone know how to install an aftermarket H/U with logic 7 system?



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      01-24-2020, 09:41 PM   #1
mclt197
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Does anyone know how to install an aftermarket H/U with logic 7 system?

Hey everyone, I purchased an Alpine head unit from Crutchfield and after some research and discussion I purchased the Axxess kit, this has everything you need to make an aftermarket h/u work with our logic 7 system.

There's a ton of wires from what it looks like and I was wondering if anyone here has experience doing that and can point me to a diy? Any help would be appreciated, otherwise I'll send it off to a shop.

Thanks

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https://www.crutchfield.com/p_120BM9...Interface.html
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      01-25-2020, 08:50 AM   #2
mweisdorfer
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You would probably need the technique harness
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      02-01-2020, 07:31 PM   #3
kazbek1
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I purchased this:

https://avinusa.com/most-fiber-optic...7-e88-e89.html

Works fine for me. You just plug the fiberoptic into the box, connect the 3 wires to the headunit wires, and then connect the 2 RCA outputs to the back of the headunit.
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