Hello!
I have a v50 2004, with the low tier sound system, and i have installed myself an aux module from tindie, works like a charm for anyone wondering.
But i need to find +12v, ground and speaker wires to setup stuff like amps, low/hi converters and bluetooth module.

But i cannot seem to find any reasonable information outside of very advanced schematics which dont help me.

This connects to the floating dash.

This connects to the head unit display part.

 

which head unit do you have. See if its listed on this page

https://www.tehnomagazin.com/Auto-ra...-Connector.htm

you may be out of luck if your model uses fiber connectors or its time to go to eBay for after market parts.

 

i dont know how to fully check that, but ive seen that link, and the closest out of the bunch there is the ct-503 even though its missing a few pins, look at the pictures and you can tell its the closest, just not exact.

 

Well the speakers are connected to the 16/105 audio module in the trunk - the Display 16/1 in the diagram - is not what you think it is - there are no power or speaker wires connected to the ICM - the infotainment control module. So this process may not be as simple as you think - find the audio control module in the trunk if you are looking for speaker wires. And there is power and ground there on terminals a1 and a2.