nasty case of alternator whine through speakers, help
#11
LS1 Tech Veteran
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Join Date: Oct 2003
Location: Wichita, Ks
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I'd say that somewhere there's a marginal connection. I'd say it could be the alternator to engine block or block to body, etc. However, if running the extra ground to the firewall did is, that's great. I'm glad you got some resolution.
Steve
Steve
#12
12 Second Truck Club
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A fellow member and i were just discussing a similiar alt whine in his truck. He had found that the ground wire on the battery post was the problem. the battery post was actually falling apart from inside the plastic battery case. It was an O.E delco though.
Hmm!
Hmm!
#14
TECH Veteran
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I know there are a lot of things in this thread you have read to do. But in my experience of professionally installing car audio through the years; I have found that when kenwood decks are teamed with certain amps you have the exact whine problem you are having. I guarantee that if you try another headunit from a friend that is not a kenwood it will disappear. They make a very good product but I ran into this personally on my own truck about ten years ago. I tried everything, then gave up grabbed a new cd 8051 eclipse deck out of our soundroom and everything worked perfect. I was using kicker sub and highs amp as well when my problem occured. Someone here will give me crap about what I just said but do yourself a favor and just try it.
#15
TECH Fanatic
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As another member mentioned, Kennwood HUs seemed to give us some trouble as well. The best one that we used in comps was always pioneer. For some reason, the signal was always the cleanest. We ended up running only Kenwood as they sponsor dB Drag racing and it is always good to support the sponsors!
#16
Charlie Murphy!
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If the ground to the firewall doesn't work, I'd try putting a 1000 MFD (1,000 micro Farad) capacitor on the alternator output terminal to ground next. It will be an electrolytic capacitor and will have a polarity (so + goes to the output and - goes to ground, I'd use the case of the alternator). I think that GM may even have a technical service bulletin on this topic.
Steve
Steve
RadioShack - mobile phones, MP3 players, laptops, and more
I'm not really sure what voltage I need or if it really matters.