C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Doube din install help?

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Old Mar 27, 2018 | 04:16 PM
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Default Doube din install help?

93 LT1. I had alpine speakers and amp to install. Since I am(hopefully) selling the car, I returned all that stuff. People bitch at the car not having a radio as if the engine was knocking.

So my question, how do I go about wiring this up? Will I need that Metra harness? Car had an aftermarket older Sony in it prior.















Last two pics show the back of the radio I am putting in. A Kenwood ddx419. First 4 pics show what the wiring situation currently is in my car.
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Old Mar 27, 2018 | 08:10 PM
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make it easy on yourself and get the harness. It interfaces with the cars plugins, so there is no cutting/hacking. You just crimp the harness onto the leads from the new radio, then plug into the factory ****.

I just did a radio in my sisters jeep, probably about the 20th radio i've put in a car. The harness makes it cake. Taking the dash apart to get to the radio is the longest part of the job.
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Old Mar 27, 2018 | 08:12 PM
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Upon closer review it looks like someone has already cut up the speaker wiring.
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Old Mar 27, 2018 | 08:43 PM
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Yeah, I was noticing that today as well. Which is why I am lost.
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Old Mar 28, 2018 | 02:10 AM
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Well.

In my experience of wiring radios, there's usually a few main key wires

Red is 12v always hot. Yellow is 12v key on hot. Black is obviously ground, orange is dimmer wire. Then you'll have 8 wires, (2 for each speaker channel, one positive and one negative) and a blue wire for remote turn on (if you are wiring an external amplifier that needs a 12v signal to turn on)

In your case it looks like someone has ran aftermarket speaker wires? I don't know the looks of your year dash, but mine certainly weren't all the same color.
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Old Mar 28, 2018 | 10:46 AM
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Did the 93s have the CDM module in the storage compartment? My 94 did (would have if it hadn't been replaced by a crappy aftermarket unit). I originally thought I had a hacked harness too, but it turns out all of the wires need to originate from back there. The metra harness actually comes with like 15 feet of wire because it plugs in back there and then runs up to the location of the radio. Just swap wire for wire the harness that is there attached to aftermarket wires with the one from your new DD. Should be pretty straight forward.
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Old Mar 28, 2018 | 08:12 PM
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A cheap sony stereo would likely have the same plug. I use a test light, find the hot all the time, the one that is hot with key on, and find one that turns the antenna on.
Then turn fader to front left and find the two that make the front left work and so on.

Last edited by xrav22; Mar 28, 2018 at 08:21 PM.
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Old Mar 28, 2018 | 10:20 PM
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Originally Posted by daverulz
Did the 93s have the CDM module in the storage compartment? My 94 did (would have if it hadn't been replaced by a crappy aftermarket unit). I originally thought I had a hacked harness too, but it turns out all of the wires need to originate from back there. The metra harness actually comes with like 15 feet of wire because it plugs in back there and then runs up to the location of the radio. Just swap wire for wire the harness that is there attached to aftermarket wires with the one from your new DD. Should be pretty straight forward.


So, are you saying to buy the Metra harness?
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Old Mar 29, 2018 | 08:12 AM
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Originally Posted by 1993C4LT1
So, are you saying to buy the Metra harness?
No. If there was a stereo in there and working with that wiring there is no reason to buy any harness. My point was simply that you would never find a stock harness that has been cut in the dash with systems that used the CDM, it was located elsewhere and that harness you see on the left in your opening was used to communicate between the CDM and Head Unit.
Regardless. All afterarket head unit wiring harnesses have the same wires in them, as mentioned earlier by Pwnage1337. You should have Red, Yellow, Black, Blue, Orange and then 4 wire pairs (Purple, Green, White, Gray). Just cut each one from the old harness in the dash and then attach the wire from the new harness that is the same color. Then plug in your new HU and it should work.
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Old Mar 29, 2018 | 08:36 AM
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Ah ok, understood completely! Do you guys have a recommendation on to crimp the wiring, or solder it?
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Old Mar 29, 2018 | 08:46 AM
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Whichever you prefer, just make sure either method you do it right. If you're selling I wouldn't take the time to solder. The real advantage to solder is just that it is less bulky.
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Old Mar 31, 2018 | 03:48 PM
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Originally Posted by daverulz
No. If there was a stereo in there and working with that wiring there is no reason to buy any harness. My point was simply that you would never find a stock harness that has been cut in the dash with systems that used the CDM, it was located elsewhere and that harness you see on the left in your opening was used to communicate between the CDM and Head Unit.
Regardless. All afterarket head unit wiring harnesses have the same wires in them, as mentioned earlier by Pwnage1337. You should have Red, Yellow, Black, Blue, Orange and then 4 wire pairs (Purple, Green, White, Gray). Just cut each one from the old harness in the dash and then attach the wire from the new harness that is the same color. Then plug in your new HU and it should work.
Going back to this post
So I will have to cut off the connectors from the first and last pic?
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Old May 6, 2020 | 10:44 PM
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Personally I'm partial to solder and heat shrink and stagger the connections. Makes a nice looking and reliable job.
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