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  #1  
Old 01-10-2015, 09:12 PM
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Default bad alternator whine HELPPP

i have did everything. i did the grounding rca in back of deck trick, grounded deck in different spot, cleaned all grounds, ran power wire from different spot, i have tried a couple inline noise filters. nothing seems to work. when the car is running is the only time i get the wine. if the apms are on rca's disconnected from deck no noise so not amps. if amps are on deck off rca's plugged in wine is present. i do hear a small wine coming from the alt could this be the problem?

the only things i can think of is getting a new alternator or getting a noise suppressor for the deck. like this http://www.sonicelectronix.com/item_...AC-CSS-12.html
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Old 01-10-2015, 09:21 PM
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Where you at in ohio? I'd love to throw the scope on the alt's output and see how that looks.

Is it the jeep in your sig? My only experience with alt internals is with ad244s.
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Old 01-10-2015, 09:28 PM
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Holland. Yes it is the jeep in signature and the wine started out of nowhere on way home from work one day.
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Old 01-10-2015, 09:37 PM
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I guess I'm kinda concerned a diode may have failed in the rectifier.
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Old 01-10-2015, 10:05 PM
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would autozone be able to tell me if it is bad?
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Old 01-10-2015, 10:07 PM
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their gear should be able to indicate a bad diode
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Old 01-10-2015, 10:08 PM
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well thanks i will have to pop it out and take it up there.
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Old 01-10-2015, 10:09 PM
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Try running a jumper wire from the deck ground to the amp ground (or the spot where the amp is grounded). See what happens.
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Old 01-10-2015, 11:24 PM
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sound stays there or gets worse i have tried it lol i have 3 1/0 wires for ground and all hooked straight to batteries i have the deck grounded back there. every time i seem to muffle it it comes back
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Old 01-11-2015, 12:07 AM
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I feel your pain man. It can be both frustrating and embarrassing. Especially if someone else travels in the vehicle with you while hearing that whine .
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