Alternator whine...with system off!!

[rc10mike 10+ year member]

Im really really confused about this one. With the engine running, but HU and amps off, I STILL have alt. whine.

HOW can my speakers make ANY noise when everything is off!!!

Equipment in my sig.

HELP!

Click to read more...

 

[Buck 5,000+ posts]

There could possibly still be an electric current flowing through your speakers even though everything is off.

 

[rc10mike 10+ year member]

Right, but how does it get there?

 

[Buck 5,000+ posts]

Got me beat. Maybe start disconnecting things like rcas and maybe you will disconnect whatever is making the sound, and you can fix it.

 

[Mexar 10+ year member]

Your getting ground loop noise.

Check, re-check, and triple check your grounds, then make them better.

Or browse the at least 2-3 threads on grounding RCA's and do that

 

[SPL KID 10+ year member]

does your car have a stock amp? If you haven't bypassed it may still be on. Other then that depending on how your system is wired your amp remote may be on ACC wire not deck remote. Also some pioneer decks still keep remote power when they are turned off manually meaning the car is still on. So pull your amp remote and see if your noise is still there when radio's off also.

 

[laryan2424 10+ year member]

the sam thing happend to me come to find out it was my rca pre outs on my radio at the time (pio 6800) my new 6000 doesnt do it at all

 

[1rockford1 5,000+ posts]

im thinkin its something to do with your rca's bro. try to pull your deck out and un plug the rca and go from there.

 

[laryan2424 10+ year member]

dats what i did unplug them then hook up new 1s just lay them across the seat and see if thats what it is

 

[rc10mike 10+ year member]

Allright, heres what I found so far.

The amps do turn off when the HU is off

the noise is still there with RCAS disconnected, already had them grounded too.

The noise is only coming through the right speaker, coincidentally, the same side as my power wire...

I pulled the wires away from the power wire and the noise went away with HU off, but its still there with the HU on....!!!

 

[jrwalte 10+ year member]

It's possible you blew the pico fuse in your Pioneer while trying to determine the original issue. That would explain why you now have noise with the HU on but not off.

You can either use your warranty to have them replace it or search for p880 or p800 pico fuse to see how you may 'fix' it yourself.