My name is Ryan, I'm new to these forums and I'm at my wit's end with my car stereo system. I am in dire need of some experienced advice on my situation.
I drive a 2007 Chevy HHR with a car stereo system my Step Dad installed for me back in '07. This system only included a 12" sub woofer, an amplifier and two additional speakers in the trunk. It worked wonderfully until I ditched the CDs and caved into buying an iPod back in '08. Unfortunately, my stock stereo did not support an iPod, so I bought and installed an aftermarket head unit. And well, everything worked amazingly until a few months ago.
One night while blasting the music at my normal volume level, the stereo shut off and restarted itself. It continued to do this an endless cycle until I turned the volume down. Since then, if my stereo gets even remotely loud, it does this.
Theeeen another issue presented itself. My dashboard lights and gauges go simply crazy when its loud. I'm talkin' going from shining bright to turning off, or even my speed/fuel gauges going to 0 when I'm clearly doing 70 mph on a full tank. It's even got as bad where this happens and the stereo is barely on.
I took my car into Geek Squad and the guy told me right off the bat that I had installed the wrong wire harness when I installed the aftermarket stereo 4 years ago. Apparently, certain GM vehicles have a "Computer System" in their stock stereo, that if taken out, needs to be replaced with the proper wiring harness that holds the replacement "computer system". He installed the proper wire harness for me and apparently it made my issue 10x worse. In which case he took it out and put my car back to the way it was.
Now I'm sitting here and my question is, what could possibly be wrong with my stereo system? I'm not too keen on the exact specs of everything I have installed, but I'm hoping the information I gave could be enough for some leads? Please help!