Hearing electrical noise in speakers, (alternator, A/C fan, windows, lights)

[Cpt.Derrek]

Ok so I have a Pontiac ***** am and I have installed a Pioneer Avic X920bt for the head unit and have installed a 600W sony amp to power my 4 6" pioneer speakers and a crunch 500W amp to power my 10" Fosgate sub. I have had everything installed and everything had been working for about a month. just a couple of days ago all of the sudden i started hearing noise from my fan for my A/C then i noticed that i was hearing the alternator aswell. this was while playing my music fairly loud. I then started to hear a poping noise in my speakers and figuered out that it was happening whenever my turn signal lights turned on or my break lights. I double checked all the connections, everything was fine, I then looked it up and found out that Pioneer head units are known for having poor RCA grounding, so I grounded the RCAs and still the same result. I have tried running my RCA directly to the amp and I still get the noise. Im all out of Ideas what could be wrong. Anyone have any Ideas? Thanks in advance.

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[Louisiana_CRX 5,000+ posts]

it sounds like you burned the pico fuse in your pioneer deck...that is a special type of fuse put on the ground lead of your rcas inside your deck...you can search and find out lots of info on it....

 

[Cpt.Derrek]

it sounds like you burned the pico fuse in your pioneer deck...that is a special type of fuse put on the ground lead of your rcas inside your deck...you can search and find out lots of info on it....

Thanks for the reply //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif but shouldnt grounding the RCAs fix that problem? or does that fuse do something special to prevent that noise?

 

[Digital Designs 10+ year member]

I would assume grounding the RCAs would help. Do you have a spare deck you could try? Or perhaps have someone else pull their car up close to yours and run your RCAs to their deck? This would eliminate the chances of it being the head unit. Also where is your ground at? It could be loose or just a bad spot.

 

[Cpt.Derrek]

I would assume grounding the RCAs would help. Do you have a spare deck you could try? Or perhaps have someone else pull their car up close to yours and run your RCAs to their deck? This would eliminate the chances of it being the head unit. Also where is your ground at? It could be loose or just a bad spot.

well I have two amps and I am getting the same noise on both and I tried running an RCA directly from the head unit over my seats to the amp and still got the noise, I have my head unit grounded to a metal bolt under my dash and I also tried a cable directly from the "-" terminal on the battery to the chassis of my head unit and got the same noise. If i were to run the wire from the battery along the surface i can hear crackling in the speakers.

 

[wone 10+ year member]

just ground the rca's

 

[maylar 10+ year member]

The grounds at your amps are what you should be looking at.