Ground loop hell!

[jaf06se]

Amps are grounded to the same screw could this be an issue (they have seperate positve lines with different fuses)

Shorten your ground! Your ground wire should not run that long of a distance. It should only be about 2ft away max.

[ToddG]

Originally Posted by Mylt1

not sure when they switched but almost every forum im on that has an audio section has had the same problem listed time and time again. which is why i will not use pioneer decks.

Or Pioneer anything for this guy. Just my opinion.

But anyway:
Definitely try grounding your HU DIRECTLY to the battery negative terminal (and only the terminal, no body ground).
If that doesn't fix it, ground your amps DIRECTLY to the negative battery terminal. Just throw wires in loose, rout them out the doors for a test. don't bother routing them all neat and incon****uous until you know if it that cures the problem. I had to do this on an Eagle Talon, it totally fixed the hum/whinning. Good luck bro.

(**** heh, picked up as a racial slur I suppose. i-n-c-o-n-s-p-i-c-u-o-u-s was the word.)

[WeeHooker]

ground your amps DIRECTLY to the negative battery terminal. Just throw wires in loose, rout them out the doors for a test. don't bother routing them all neat and incon****uous until you know if it that cures the problem.

x2. A set of battery jumper cables should work for this test.

[demondrive]

you dont want your grounds to be longer than about 2ft like jaf06se said. please provide some pics of your grounds so we can see, or describe em better as well as guaging used

[helotaxi]

Originally Posted by demondrive

you dont want your grounds to be longer than about 2ft like jaf06se said. please provide some pics of your grounds so we can see, or describe em better as well as guaging used

Your ground goes all the way back to the neg post of the battery. Which would you rather have carryin the current most of the distance: copper wire of gauge sufficient to carry the current needed by the amp or sheetmetal of unknown thickness and conductive properties? I typically run my ground all the way back to the battery, good ground every time.