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ISO connector explained, individual wire questions (stereo, audio)
I need some help to identify the wiring on a ISO connector for this particular Berlingo. I know there is couple of people on here who know what they are talking about and probably will guide me in the right direction. I'm going to end up fitting an aftermarket stereo and I want to prepare myself knowing which wire does what. 
Here are the typical ISO connectors and the color coding for this particular Citroen:
Here are some of the speaker wires that don't match what's on the ISO
So i've done half the work to help you out identify what's going on here. We have 6 speakers total meaning 12 wires that don't make sense or color match the white ISO speaker connection. I assume they don't directly go to the connector and terminate somewhere (while change color), also I don't quiet understand the pairs either. the white connector is a 8 pin, all pins taken, with 4 pairs. I pressume the further away speakers use thick gauge wire, while tweeters and fronts are thin gauge due to distance. The black connector has 6 pins taken and 1 pair (thick yellow and thin yellow).  I need 3 wires from here, I suspect the others are extras like the top display, or blue wire was for some remote stuff that this car hasn't got. Trouble is how do I differentiate them. Again suspecting the thicker gauge is where it matters, but which one is ignition...
ISO connector is standard connector. That means it is wired
the same on all cars.
Here is the pinout of iso connector:

Wires on the speakers don't match color wires on iso connector.
That is ok. They don't need to match.

Front speakers are connected in pairs on the same wires.
So your 12 wires are connected to 8 wires on brown connector.

You can test wires and speakers by using 1.5 AA battey.

Briefly connect 1.5 AA bat to ISO connector B between wires 1 and 2.

You will hear sound coming from your right rear speaker.

Best regards,
p62 of the owners handbook has the radio connectors for the Multispace, maybe of some use?
Oh I completely forgot about this thread. You know there is a saying if you want something done right do it yourself ( ͡ᵔ ͜ʖ ͡ᵔ ) Son of a bitch I guess I'm not the only one who knows these old school tricks with the battery to find the polarity. That's exactly what I ended doing Brajmobil. Also you should know better in the OEM world the word universal doesn't exist, every ISO connector diagram is different of course and none of those matched my wire position let alone colors.

It's all sorted though. Ghetto hardware to the rescue! If anybody cares you can read more about it here

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