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C5 aftermarket wiring help

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Old Apr 5, 2020 | 08:44 AM
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Default C5 aftermarket wiring help

The C5 Corvette I have came with a *** import style double din bag of crap from the 90s, which I’m now trying to swap for a JVC single din. Had hoped this was plug and play as I’ve not touched car audio for about 10 years but no such joy. Hopefully there’s an adaptor or harness pre wired that’s available, but here’s what I’m currently looking at.



This is the wire that is currently in the car that came from the *** stereo:







This is the wire that was loose in the car so guessing the standard Chevy one:







These are the two ends of the harness that came with the new JVC headunit:







Aaand this is the back of the JVC unit:







Any help appreciated!
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Old Apr 5, 2020 | 03:13 PM
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Originally Posted by Mike-R
The C5 Corvette I have came with a *** import style double din bag of crap from the 90s, which I’m now trying to swap for a JVC single din. Had hoped this was plug and play as I’ve not touched car audio for about 10 years but no such joy. Hopefully there’s an adaptor or harness pre wired that’s available, but here’s what I’m currently looking at...
@Mike-R The good news is that yes, it could be plug-and-play, but we need more info. Do you know, or can you determine, if what you have currently in place is a replaced headunit keeping the rest of the OEM system intact, or a gutted-out-and-rewired-from-scratch installation?

Without knowing that first, it would be very difficult to try to help you because we would be guessing.

If it is a replaced headunit keeping the rest of the OEM system intact, then to properly do that an adapting interface must have been used. This interface is not a simple wiring harness, and it is needed because the C5 Bose system doesn't use standard signals.

The 2 most commonly used interfaces are:You would need to determine if an interface is in place and your new headunit would need to be connected to the interface.

Take a look at this Post for more details and info, so you can have a better idea.

Last edited by GCG; Apr 5, 2020 at 03:23 PM.
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Old Apr 8, 2020 | 12:44 PM
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Thanks, I’ve ordered the Axxess one and see how I get on. Chasing the main plug it does seem to birth two other white plugs further down, so it does look like it’s modified, unless these are standard too but they don’t look it. Visibility is awful back there so I think it’ll be a case of plug in and see, and if it doesn’t work have a little cry and then call in the professionals.
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Old Apr 8, 2020 | 01:06 PM
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Originally Posted by Mike-R
...Chasing the main plug it does seem to birth two other white plugs further down, so it does look like it’s modified, unless these are standard too but they don’t look it...
Yes, there are 4 of them

The OEM head-unit has 4 female connectors in the back:
  • C1 / C2 (which is a single siamese connector) - power, ground, BCM data, front and rear speakers
  • C3 - power amp inputs
  • C4 - pre-amp outputs



Last edited by GCG; Apr 8, 2020 at 01:33 PM.
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