No sound with android head unit

[ryan806]

Hey all.

I have been really struggling to get my chinese android head unit working with my A3 I recently acquired.

The car has the double din concert stereo and bose speakers/sub etc, from reading the forums I think it may be the full bose sound system. The head unit powers on and works great, its just the no sound issue I cannot get my head around. I have tried connecting the amp control wire as I was told the amp powers all the speakers, but this has not worked. I either have the wrong lead or I am overlooking something, If anyone has managed to get bose to work with a similar head unit it would be greatly appreciated!

If you need any more info, just let me know.

Cheers

 

[s8craig]

First of all year of the A3 would help and type of connections, ISO or Quadlock?

A picture of the harness would help. The old head unit has the pins marked on the lid, so you should be able to see if there are 4 signal wires connecting to the 4 pins required for the amplifier signals.

And yes the amp wire should be connected, does the amp make any soud at all when that pin goes high to +12v to tell the amp to power up? There is a remote pin on the harness that connects.

 

[ryan806]

First of all year of the A3 would help and type of connections, ISO or Quadlock?

A picture of the harness would help. The old head unit has the pins marked on the lid, so you should be able to see if there are 4 signal wires connecting to the 4 pins required for the amplifier signals.

And yes the amp wire should be connected, does the amp make any soud at all when that pin goes high to +12v to tell the amp to power up? There is a remote pin on the harness that connects.

Thanks for getting back to me.

So the year is 2009, my stereo has a quadlock connection see below picture of the car quadlock connector.

I am at work right now, once home I will take the other pictures and update my post.

Cheers

 

[s8craig]

This might help you with the wiring, you need to make sure you are connecting to the 4 inputs and ground of the amp and sending 12v to switch the amp on.

 

[ryan806]

This might help you with the wiring, you need to make sure you are connecting to the 4 inputs and ground of the amp and sending 12v to switch the amp on.

Thank you. It would not edit my last post for some reason but I took some pictures.

The short blue wire is the amp one, i had originally joined this with the other blue amp wire. I had initially thought I done it wrong as there was no sound, so I cut it and plan to resolder.

 

[ryan806]

Ignore that wiring guide, I have just figured out that was for my old Focus harness. The Audi one I purchased has a different layout, which may explain why I have been experiencing issues. I will see if I can get an accurate diagram, thanks for pointing me in the right direction.

 

[c188co]

Thanks for being available to provide advice on this one



Mine is for Audi A3 2011 supplied with RNS @ navigation plus. BOSE system

Same predicament as Ryan 206 and exact same quad connector with the blue and green 12 female pin connector.

I tried the suggested connections but soon realized it was for a non Bose system .\ Also checking my harness to the radio I couldn’t find the combined Right & Left rear negative.

No sound whatsoever. My connector is not cooperating much as it is as the attached, but I built some lead testers and I am able to insert pins in the female side and couple with the blades on the right side connector.

Your help is much appreciated.

 

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