Basically take a ground wire (not your existing one, since we don't know if there's a problem with it or not) and ground the casing/frame of the amp, either with a mounting screw or however you prefer. I was asking for specific model numbers so I can try to look up their signal and power ground circuitry to see if it would be of any help in solving your problem.

So you're saying you can hear the noise in both of your amps?

 

yes I can hear noise in both and when I use a ground loop isolator they turn off. I will get you a model number today when I get to my car.

 

Okay, here are some pictures, remember this all looks like **** because I have literally ripped everything out and replaced a lot of it! So it is just laying around so it is easier to fix!!!

picture 1- shows the whole mess of wires. The blue 4awg cable is my power wire. Everything else comes from the passenger side. This is also with only 1 amp in my trunk, my other one is not in there because I can't stand the noise! My sub amp and sub work with little noise so I have it plugged in only!

picture 2- shows the kenwood amp that is having the case grounding problems

picture 3 - my ground in the trunk, right next to the window washer fluid tank

picture 4 - picture of amp grounded too.

 

I'm assuming in the 4th pic, that the ground cable is bolted underneath the cover. Does it not work using the normal ground terminal, but works grounded this way instead?

 

Yes it is underneath the cover and the little allen wrench bolt is holding the cover down.

Well, I haven't really tested anything since doing that. I'm sure if I pull the RCA's it will unground again. I will test it right now.

 

Okay, it does not power up without the RCA's plugged in. RCA's plugged in, the light comes on.

 

bad rcas,or you ran your rcas and power next to eachtother,you should run those wires on opposite side of the car

 

^somewhere in the 9 pages he said he already replaced the RCAS, same thing happened, and the rcas are ran on the opposite side of the power.

 

Yeah, I replaced the RCA's, because at first they were some cheap ones. Well, the expensive ones sound the same lol.

 

i have the same problem and it started the same way.
vey]ry intrested in what you find

 

omg we had the same thing happen! did tons of troubleshooting with no luck! and after reading 9 pages of your post and feeling your frustration i ran across this post and i was desperate to find a cure. tried the pioneer fix and it all went away! no $hit!

hope this helps you!


here is a link to where i foud this
http://www.caraudio.com/forum/showthread.php?t=198477

 

I tried that with my Sony headunit ^^^^^. The weird thing is we have the same problem and were both from sl, ut. When I did that to my rcas it didn't do anything, still noise

 

That wouldn't work for me because my Pioneer deck has the RCA's on the end of a wire that plugs into a proprietary socket on the back of the deck. Plus that makes it really hard to push the RCAs on. It didn't matter anyway because we tried an Alpine deck and I had the same buzz.

 

damn! I thought I had it for ya lol

let me know if you need some local help

 

I wish that were the problem. For now I'm just cruising with just my sub hooked up, and the speakers hooked straight to the headunit. I can't hear the high frequency noise through it.