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Wiring diagram for installing a subwoofer

72K views 17 replies 7 participants last post by  peaty  
Hello everyone! Just got my 2018 Premium a few days ago and I'm looking to put a sub in it. I'm trying to find a wiring diagram so I can tap into the harness behind the headunit and haven't been able to find much yet. Any help would be greatly appreciated!
Here is the wiring diagram I found and used for wiring the LOC to my stock stereo on my 2019 Crosstrek. I tapped into the 6 pin harness for speakers, on 10 pin harness just use the power(constant) and ground and you should be good to go. Took about two hours of researching to finally find this diagram. Hope this helps!
 

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