156 head unit change - wiring diagram - Alfa Romeo Forum
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156 head unit change - wiring diagram


The Sony head unit in my 156 sw only occasionally plays CDs and doesn't do anything else. Does anyone have a wiring diagram so that when I pull the current head unit out I can easily wire the new one? The current unit does not appear to use the ignition live either so has to be turned completely off, which is also a pain!


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You should have a look in the ICE forum on here. Basically it's ISO with a single change; red and yellow swap so that it comes on with ignition rather than being permanent live, and whoever fitted yours didn't do this. It does mean no radio when the ignition's off though.
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156 , change , diagram , head , unit , wiring

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