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I am trying to decipher the wiring/plug coming out of a mid 70s Alfa Romeo radio/cassette deck. It is a nine pin plug with orange, red, brown, green and 4 blacks. There is also a separate fused yellow wire with a bullet connector. Any help would be appreciated.

Thanks.
 

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Depend what radio you are talking about!

Most radio I installed back then had 1) a hot all the time 2) a hot for ign. 3) a hot for when the lights were on which would dim the display. 4 blacks seem like speakers?
other had a power feed out for a booster. You have to look at the make and google it where they have a wire diagram for whatever radio you have.
 
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