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Had my 89 C4 since May last year & finally got a CD player the correct size.
It came with a wiring harness to plug directly into the 12 way Vette wiring socket.
But this has been removed from my car & all i'm left with is a load of wires in the dash.
The colours in the car don't match the colours on the new harness & I cannot get the speakers working correctly. Any idea's where I can get a wiring diagram or even a photo of the original 12 way socket in the car so I can figure which wire goes where?
Have you tried looking in the C4 Audio department there is loads of info in there, there is a company in Florida I think who repair Bose headunits, cannot think of their name at the moment, but they have wiring diagrams for most C4 models on their website, I spent a lot of time on this one as I swapped out my Bose for an Alpine head unit a couple of months ago and had the same problem with wiring - best of luck