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Please help with dreaded alternator whine

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Old Jun 13, 2009 | 12:07 AM
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Default Please help with dreaded alternator whine

Well, it's almost done. I have the steering wheel controls working, etc, but I now have alternator whine!! I hooked everything up to the same ground in the dash and connected it to the GMCO ground, and I have 4 guage ground wire running from my amps back to the battery terminal. I know I need to relocate the head unit area ground wires, I'm just not sure where the best point is. Should I disconnect all of the combined head unit area grounds from the GMCO and run them to a chassis ground (such as the bose amp bolt area), or should I run them to the ground distribution block that is at the amp, or should I put yet another wire through the firewall and run them to the battery (hardest in terms of amount of work required)?

In this scenario, would ground loop isolators or power filters work?
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Old Jun 13, 2009 | 01:29 AM
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Originally Posted by nativesun1979
Well, it's almost done. I have the steering wheel controls working, etc, but I now have alternator whine!! I hooked everything up to the same ground in the dash and connected it to the GMCO ground, and I have 4 guage ground wire running from my amps back to the battery terminal. I know I need to relocate the head unit area ground wires, I'm just not sure where the best point is. Should I disconnect all of the combined head unit area grounds from the GMCO and run them to a chassis ground (such as the bose amp bolt area), or should I run them to the ground distribution block that is at the amp, or should I put yet another wire through the firewall and run them to the battery (hardest in terms of amount of work required)?

In this scenario, would ground loop isolators or power filters work?
You need a single chassis ground. Run a 2 gauge wire from the chassis to a dist. block, and ground your amps there. Ground your deck as required with the wiring harness, and if you still get noise, run your deck ground to the dist. block. Make certain that you have good ground to the chassis. That should take care of it...

Also, be sure that your gains aren't set all the way up. Start from "0", set your deck volume at 3/4, and start turning the gains up until you either get it loud enough, or it starts to either clip or distort, which ever comes first.... The lower your gains, the better signal to noise ratio you will achieve, and the better your system will sound at any volume.

Good luck!
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