Can't fix alternator whine ground loop driving me crazy!

[BFF Larry]

Black wire is any ground available.

The red and blue wires is soldered inline with the yellow 12 v constant wire closest to the headunit.

Preferably at the radio wire harness.

[BFF Larry]

You can also get these inline noise filters from Meijers, some walmarts, or other local stores and any auto part stores.

[Wicks]

Disconnect HU from RCA's.

Connect a portable music player (iPod) to the RCAs and try that.

If you still have noise, its the RCA's or something else downstream.

If the noise is gone its the HU.

The inline power filter is a good idea. If it works, it would point out that the HU power supply isn't very good.

[ALPINE408]

Non power rca in line noise filters have worked wonders for me in the past and there cheap!

I have not had that problem in years but the quality of my gear has gotten so much better and pricy since then

Let me see if I can you a link

[ALPINE408]

http://www.sonicelectronix.com/item_38580_P.I.E.-EIS-ILNO.html?utm_source=froogle&utm_medium=organic&utm_campaign=froogle&rkg_attid=458933907&zmam=75672847&zmas=1&zmac=1&zmap=38580

this is the style i used in the past east plug and play no wires to hook up

[skittlesRgood]

I've had the same problem with my pioneer headunit.

Every thing you tried, I have tried as well. but still failed to fix the noise.

Until I used an inline power noise filter.

I just matched up the fuse rating to the headunit and bought the one closest to the fusing.

I used this one

http://www.sonicelec...I.E.-NF-20.html

But here is a cheaper one But does the same exact thing, but looks better.

http://www.sonicelec...AX-ANR1000.html

just so you know, those are two different types of filters. the axxess one will have a lower output voltage by about 1v, maybe more. then you dont want to match amperage on a component. you always want the component to be able to handle more than what you will use. so a HU with 10 amps of fusing should get at least a 15amp filter. lastly, these filters will only help if the power supply is dirty. if its anything with the audio equipment that is making the noise, the filter wont do shit.

[skittlesRgood]

I've had the same problem with my pioneer headunit.

Every thing you tried, I have tried as well. but still failed to fix the noise.

Until I used an inline power noise filter.

I just matched up the fuse rating to the headunit and bought the one closest to the fusing.

I used this one

http://www.sonicelec...I.E.-NF-20.html

But here is a cheaper one But does the same exact thing, but looks better.

http://www.sonicelec...AX-ANR1000.html

*Edit* lol nvm im slow...this goes like you connect the red to the constant 12v and then ground the black and then connect the blue to the battery constant on the h/u correct?

on the Axxess filter, the box tells you one way to wire it. the instructions tell you another way to wire it. i called axxess and they told me one of the two ways. the way they told me was incorrect. when i told them the way they told me didnt work so i hooked it up the other way and it did work, they told me i have it hooked up wrong now and to do it the way they said... the way that didnt work. fuck axxess lol

[BEEMDUB]

Non power rca in line noise filters have worked wonders for me in the past and there cheap!

I have not had that problem in years but the quality of my gear has gotten so much better and pricy since then

Let me see if I can you a link

I actually have a filter like that already on the rcas...it helped a great bit...but not all the way > : (

[shaggy]

http://autoplicity.com/products/242191-MSD_Ignition_8830_msd_noise_filters.aspx?utm_source=GoogleShopping&utm_medium=CSE&utm_content=242191NOFITMENT&utm_campaign=GSNOFITMENT&gclid=COzLldHh6q8CFZFR7AodzBTL3g

Buy this . On the the passanger front wheel well there is a ground and a spot where you jump start the car. Install this there it has worked for me to filter out alternator noise.

Edited May 6, 2012 by shaggy