Brand

I need some real help here. I have two Audiobahn AW 1200x Powered by a Crossfire VR1000 Two Pioneer 6 1/2 TS-G1643R Powered by a Kicker ZR 120. Now when i turn my truck on i get a loud whine through my speakers ( Alternator Whine) i've tried many different ground connections like the back of my seat bolt, the bucket seat bolts and now i have it directly grounded to my frame and still i get the loud whine. All my RCAs are brand new and are not touching my power cables. Can someone help me out here and tell me what im doing wrong?

luke81

What kind of head unit do you have? If it's a Pioneer, you've popped the internal pico fuse - but there is a solution. If it's not we need to work deeper into what you've got going on, but lets start with the type of HU.

Brand

Kenwood head unit older model i've had it for about 3 years

Banksy

Basically every single step in finding it. I can't help but to think it's still your ground, or shit RCA shielding; but try those steps and at least you can exclude each component one by one.

How can you eliminate alternator whine in a car audio system

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That's what i spent all day doing i took my seats out, took the carpet up ran all new wires, ground, power, remote, everything still i cant figure it out. I'm about to the point where im going to take it to a shop, I've never had any shop touch my truck i've done everything my self but this has me baffled.

luke81

Do you have a different HU you can swap in real quick? Have you done anything to the ignition system, spark plugs, anything at all?

Brand

I have a stock HU from a 2004 Silverado i just need to get a connector. Do you think it could be my head unit thats in there now?

I havent done anything to the ignition system or the spark plugs. Last thing mechinical that was done to my truck was a rebuild transmission and the routine oil changes but since then i've ran a system without a problem but when my door speakers when out i got new ones and since putting the new ones in i've had this problem.

blownrunner

You have a ground loop. HU is grounded up front, amp in the rear, different ground potentials, and the power ground is traveling through your rca cables. Ground your head unit in the same place as your amplifier. You can install a ground loop isolator, but it will reduce you rca preamp signal strength.

Brand

I have a ground loop isolator it does reduce some of the sound. So if i run my ground from my head unit to the same place as my amps are grounded which is my frame that will fix it?

the727kid

What Luke mentioned in the first post, I had happen to a Kenwood Navigation unit a few years back. Try getting a piece of wire, screw it down to a random screw on the headunit chasis and then wrap the other end of the wire (bare wire) around the RCAs that are plugged into the headunit.