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#408954 - 10/25/06 08:06 AM if you own a pioneer headunit and suddenly get noise...
TEAM SHIMANO/FALCON
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Registered: 05/24/06
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i've noticed a lot of people having issues with getting sudden alternator noise with their pioneer headunit. if you suddenly get alternator noise, you probably popped the microfuse inside the deck thanks to a poor ground. with a pioneer you MUST ground the chassis of the headunit to the chassis of your vehicle. same with the main ground. if you don't, you will pop that microfuse that's less than half the size of an eyelash. with this fuse popped the headunit tries to seek a ground through the rca's. this can wear out your speakers a lot faster than they should because of constant flutter. any authorized pioneer benchtech can fix this problem in less than an hour if he can get right to it. just taking a couple extra steps during the install will save a lot of headaches later on.

in defense for pioneer, i agree they make a beautiful deck at a great value. i sure do love mine.
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#408955 - 10/25/06 01:42 PM Re: if you own a pioneer headunit and suddenly get noise...
Bagged04
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Thanks for posting this I'm going to install my new 780MP after work today and would have went thru the harness to ground. Thanks again.
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#408956 - 10/26/06 09:44 PM Re: if you own a pioneer headunit and suddenly get noise...
jiggy2dmax
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I thought that problem was rendered with the new decks. However, good tip.
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#408957 - 10/26/06 09:52 PM Re: if you own a pioneer headunit and suddenly get noise...
Rick7079
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Registered: 02/01/04
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I have heard of some issues but I've personally had 7 diffrent Pioneer HU in 3 diffrent cars and have always used the harness ground and have had zero noise problems so it's not a must in every case but is a fairly common issue.
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#408958 - 10/27/06 02:50 PM Re: if you own a pioneer headunit and suddenly get noise...
TEAM SHIMANO/FALCON
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i've owned 3 pioneer decks and the only one that didn't pop the microfuse was the deh3400 that i had back in 2002. other than that, i had issues until i finally grounded the chassis of the deck. maybe it's just the stock wiring in gm trucks that isn't capable. either way, i'll use the stock power and ground for my dad (he keeps his barely audible most of the time), but not me.
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06 SIERRA SINGLE CAB
ALPINE 9833
MEMPHIS MCA3004 AND MCD500
MOREL 57.05 TWEETS
SEAS L18'S
MEMPHIS HPO10

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#408959 - 10/27/06 10:54 PM Re: if you own a pioneer headunit and suddenly get noise...
Forklift
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Registered: 10/16/06
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Ive seen quite a few get tons of noise after somebody lost the ground on the amps and they tried to get a ground through the rcas and the radio
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#408960 - 10/30/06 10:06 AM Re: if you own a pioneer headunit and suddenly get noise...
Mighty MOG
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That is exactly what happened to my HU a couple of years ago.
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#408961 - 10/30/06 10:18 AM Re: if you own a pioneer headunit and suddenly get noise...
TEAM SHIMANO/FALCON
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 Quote:
Originally posted by Mighty MOG:
That is exactly what happened to my HU a couple of years ago.
i remember. howard at acs is "the man"
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06 SIERRA SINGLE CAB
ALPINE 9833
MEMPHIS MCA3004 AND MCD500
MOREL 57.05 TWEETS
SEAS L18'S
MEMPHIS HPO10

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#408962 - 11/05/06 12:07 AM Re: if you own a pioneer headunit and suddenly get noise...
rc10mike
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Registered: 10/22/06
Posts: 41
Loc: Jax, FL

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Well I sent mine in a week ago for repair. Its a p860mp. Anyway, this may seem like a dumb question, but where on the case do you attach the ground?
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#408964 - 11/06/06 06:17 PM Re: if you own a pioneer headunit and suddenly get noise...
P00kie
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A friend told me about this about two years ago when I got my DEH8600. He told me to get an Alpine because the noise suppressors in Pioneers were very fragile. He never gave an explanation for the bad noise suppressors though. Mine was grounded using the factory harness and I had no noise problems. I just had mechanical problems with the face.
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