I installed an Alpine ILX W650 stereo in my 2007 cobalt using a Crux SOOGM-16B wiring harness.
Originally I connected the speaker wires from the stereo to the speaker wires on the harness, but there was a constant white noise/static. I fixed that by buying RCA to speaker wire adapters and connecting the speaker wires on the harness to the adapters.
The white noise is gone, but now I hear a quiet crackling (might be the wrong word) sound in place of the white noise. As well, when I turn the volume down to 0 or I turn the car off and open my door, which turns off the stereo, there is a loud pop noise.
I've linked a video of the issue, but it may be hard to hear the crackling over the noise from the microphone.


Links to stereo and wiring harness manuals:
https://support.alpine-usa.com/produ...LX-W650_EN.pdf
https://www.sonicelectronix.com/land...s/soogm16b.pdf

 

Typically cracking noises is from wires not fully engaging/poor connection. How did you tie the wires of the OEM harness to the 3rd party harness? If you just did a nip and twist, and covered it with electrical tape, that's your issue.

 

I’m actually trying to figure out the same issue and can’t find my PDFs. Thanks for sharing.

 

Hey, sadly I had to get rid of my cobalt, but I still sort of remember how I fixed the issue.

I soldered everything. If you don't want to then just make sure the connections are super solid.

I bought two of these and used them for the speakers. Instead of using the speaker wires sticking out of the stereo with all the other wires, I capped those off and connected the RCAs on the stereo to the below, then connected that to the Crux wiring interface


I am recalling this from memory, but I do actually still have everything connected and sitting in the trunk of my new car