Volkswagen Passat Speakers not working

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Speakers not working

Volkswagen Passat 2012 TDI SE 188000 miles

I just bought a 2012 VW Passat TDI SE and the previous owner put in an android head unit and something might be wired wrong or something. None of the speakers are working, only the two tiny ones up by the windshield work. Can I have some help please. I uploaded images I think that might help

Aaron from United States a year ago

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Same issue here

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Cyanflowers from other a year ago

In the background in photo 3 there is the big quad lock from the old radio unit. There is this dark yellow/beige 8pin adapter. This is for the speakers. So there is a cable missing it looks like.
Edit: maybe the previous owner added some extra cable it looks like. The main connection from
The android radio is the big one right next to the red fuse

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Aaron from United States a year ago

That extra white cable leads to the fuse panel where it is wrapped around a 30amp fuse. See 4th photo.

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Cyanflowers from other a year ago

@AaronI checked the fuse and it is the fuse for the 12V cigarette lighter. I am absolutely clueless why it is connected to the radio like that. It looks like it is connected to the power input of the radio. Normally these radios have a matching cable tree for the original cables so it gets it power from the connector. Look my picture. You need a connector for the matching QUADLOCK in your passat and the new radio. You‘ll have to check which exactly you need. I searched for „passat 2011 radio cable“.

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Cyanflowers from other a year ago

@CyanflowersThis is the connector (QUADLOCK) where the speakers are in (red circle)

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Cyanflowers from other a year ago

Were you able to fix it?

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Aaron from United States a year ago

No. I ended up getting a factory radio, which didn't fix it. I'm probably going to end up popping the door panels off to check the speaker connections in there. I just haven't had time to yet.

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Best answer (according to Aaron)

Aaron from United States 8 months ago

After some further digging, I ended up finding out that the speakers ended up being bad because I recently bought new speakers off a friend and it works perfectly with no issues. I will say that if you don't have other speakers to test at the current moment, you could take a multimeter and test for continuity from the head unit to the amplifier then from the amplifier to the speakers, or if your car doesn't have an amp then you could just test for continuity from the head unit straight to the speakers.

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Scotty from Great Britain a year ago

My dad's having the same problem as this, I kept finding posts that were pointing me to an amp somewhere being the problem but after a pretty search, I'm quite confident that there is no secondary amp in the car. Just the original head unit. Perhaps your previous owner installed the new head unit to try and fix the speaker issue but it did t go to plan?

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Aaron from United States 8 months ago

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Aaron from United States a year ago

I've gotten a factory radio and I've checked the connections underneath the door panels as well as any fuses and I can't seem to find any issues. Anything else I should try?

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