SS33

Hello, some of you might remember me from back in the day.

I'm having a strange electrical issue with the new headunit I just installed. I had an AVIC-D2, that was stolen last month, and have just finished installing my new AVIC-Z140 replacement. I have an 06 SS/SC withe the upgraded pioneer system, and am retaining the stock amp/subs. All of my stock harnesses were cut off, so I hardwired in the new headunit.

*While the key is in the ACC position, everything is kosher, all channels on the stock amp are working proper and the sub as well. However, when I start the car, things go to hell, my rear channels distort, and the sub sounds like absolute ****.

I am pulling my 12V RAP ACC from the fuse panel, just as before. I have even added an additional ground, thinking possibly that I wasn't getting a clean ground from the stock harness anymore. I even tried pulling my 12V ACC directly from the ignition, and the issue remains.

If anybody has any ideas here, I would be greatly appreciative.

Thanks in advance.

tomj77

iTrader: (2)

I'd say goto a wrecker, cut out the end of the harness, fix urs, then get a proper kit and after market harness that will properly plug into ur fixed harness, and see what that do. Other than that idk. Why didn't the jackasses just unplug em when they stole it.

EmperorJJ1

iTrader: (5)

what does it do if you try it on volume 1?

do you have anything else wired up other than the speaker wires, acc, 12v and ground?

SS33

I'm not sure what you mean by trying it at volume 1, but I will do so at lunch, I believe even at low volumes you can hear distortion in the rear channels once the car is running. In acc position, all is well. I'm still on the original battery, and I'm sure it's due for replacement, is it possible that could be the culprit?

The only other thing hooked up behind my dash is the pac steering wheel control interface.

SS33

Yeah, I know I should have, but in my mind i figured the fewer places I hafta splice and solder back together the better.

And tell me about it, the ******* even cut my antenna wire and backup camera feed, didn't even try to unplug anything.

If I can't sort this out soon, I'll go that route, but logically there's nothing those harnesses do that I can't with solder right?

SS33

So other than speaker wires, acc, 12v, ground, I have the pac unit wired to the steering wheel control wire (controls working) the black/white wire to acc (per pac instructions) and the blue remote lead from my stereo to the pink wire to turn on the stock amp.

EmperorJJ1

iTrader: (5)

hardwiring vs having the stock "harness" is realistically the same. I was thinking a sorta hail mary that either something was connected to the GM lan wire that could be pissing off the stock amp or possibly too much voltage because a high volume level. but those are pretty slim.

the only other thing i can think of is your stock amp is fried

SS33

Yeah, I have the GM lan wire terminated and tucked away, it isn't hooked up. I'm at the hail Mary stage here, lol. Grasping at straws also, thinking the battery could be my weak link. I guess the amp could be fried, but it's so weird that it works fine in the acc position. I'm at a loss.

Worst case if I can't figure it out I guess I go aftermarket amp. My Polk speakers would probably appreciate it. And it would give me a reason to upgrade the sub.

EmperorJJ1

iTrader: (5)

are all the speakers aftermarket? only thing stock is the sub?

SS33

Yes

tru2nrtt777

iTrader: (1)

Stock speakers for your model should be 2 ohm, not 4 like the aftermarket. I doubt that would have any negative effects on the amp though. I doubt it would be the battery being an issue also. I honestly don't know what to tell you other than thinking it to be a wiring issue. Have you DDM'd your power to see the voltage difference between accessory and run? IDK, I have a volt meter and sometimes it can read as high as 15.4 when the car is running and my subs are off(amp wired to switch)

SS33

Didn't get any time to do anything with it today, hopefully tomorrow after work I can dig back in and re check everything with my meter. I'll report back if I find anything

EmperorJJ1

iTrader: (5)

you can try an amp bypass to rule out or confirm if the stock amp is the culprit. If you hook the speakers up to the HU directly and you dont have any issues then you would just need to get a new amp for the stock sub or go with a complete aftermarket bass solution.

SS33

That's a good idea, I wouldn't have thought of bypassing the stock amp. I like it though, anything that can help me pinpoint the issue, because at this point I'm baffled, lol. This week is crazy hectic for me, so I'm not certain when I'll get time to get back into it, but I appreciate all the ideas guys.

I'll update this as soon as I find something out. Thanks again.

SS33

There was something wrong with the stock amp. I bypassed it, ran my speakers directly off the head unit, and everything sounds great. So now I just need to address the subwoofer, and I'm golden.

Thanks for the help all.

EmperorJJ1

iTrader: (5)

boom... glad u got it figured out