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post #1 of 8 (permalink) Old 08-03-2014, 05:59 PM Thread Starter
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Stereo Install/troubleshooting Q's

I bought myself a 2008 Cobalt LS a little under a year ago, and the whole time I've never had working speakers in the front (either side). I tried to rectify this problem at first by going to the junkyard and finding a pair of speakers to swap them out. I went ahead and swapped them, and no change. I have absolutely no sound from the front speakers whatsoever. I should clarify that this car has no stereo modifications at the moment. The head unit also stays on after the car is turned off until what I'm assuming is the anti-battery draining feature shuts it off. I don't think that these two problems are interconnected, as the door switch is stuck in and I'm guessing that's why the head unit doesn't shut off.

I'm at the point now where I trust that this car is going to last a while, and I'd like to go ahead and get the front speakers working as well as do a little bit of upgrading.

I had the head unit out today to have a look and confirm that there wasn't a previous hack job that could be causing the speaker issues, and it looks untouched.

I'm considering having my Alpine deck installed, as well as some door speakers, at the local Future Shop.

The thing is, I have all the skills to do this (have worked with electrical stuff in College, aircraft application), but I just lack the confidence to do it on my car unless there's a detailed method laid out.

So what I'm getting at is what can I expect to need to do this on my own, is the head unit the most likely cause for the front speakers not working, and if anyone can point me to some clean/well done installs that'd be great.
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post #2 of 8 (permalink) Old 08-03-2014, 06:41 PM
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Installs are pretty straight forward for head units. Buy the mount kit, the wiring harness, match colors and youre good to go. Realy easy.

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post #3 of 8 (permalink) Old 08-03-2014, 06:48 PM Thread Starter
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post #4 of 8 (permalink) Old 08-03-2014, 06:53 PM
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If you got speakers at a junkyard they probably had already suffered from the same ailment as yours. In my case it was the connectors right at the speakers. The wires break right at the back of the connectors because they are not restrained and wiggle till they break at the weakest point.( at the crimp)
Replace with new speakers, cut the connectors and crimp on appropriate tab connectors. You will need a GM speaker adaptor. Amazon has them pretty cheap.

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post #5 of 8 (permalink) Old 08-03-2014, 07:08 PM Thread Starter
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Now that I think about it, the speakers don't work anyways, so I can cut and crimp on some connectors and test them on some Alpines I have in the garage (known to be good). They're 6x8's so they won't fit, but it'll still help me troubleshoot. I actually cleaned the connectors as best I could when I was swapping in the junkyard speakers and even used some dielectric grease. I didn't notice any broken wires when doing that, but I guess we'll see when I try with the Alpines. You don't mean that the wires were severed, I'm assuming. It was just a bad connection? I could check the plug with a multimeter I guess. I'm not positive on how to go about that, any tips?
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post #6 of 8 (permalink) Old 08-04-2014, 03:07 AM
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Take a sewing pin and stick it through the wire jacket 6'' away from the connector, then attach on probe to the pin and with the other test both pins in the connector, one should read zero ohm or beep if you have this option on your meter. Do the same for the other wire. Pin holes won't hurt and they will reseal.

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post #7 of 8 (permalink) Old 08-07-2014, 03:02 PM Thread Starter
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What is this PAC harness business? Future Shop says I need it, the local audio shop says I don't. I'm trying to get to the bottom of this, haha.
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post #8 of 8 (permalink) Old 08-10-2014, 08:59 AM Thread Starter
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I figured I'd give a little update. The front speakers weren't working because of a wire/plug issue. I ended up going to the local shop, helping them, and we put in speakers/my deck. I didn't think it'd look as good as stock, but it looks great. Thanks for the help.
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