Never ending Alt whine

[knukonceptz 10+ year member]

Tried the seperate power/ground to the battery ( located in the trunk)....Tried the RCA's removes from the h/u and plugged into the amp....

Still there....

When you say tried, is it still wired that way? Powering the amp and HU at the same point with 10 gauge should guarantee both units haver the same voltage. Now its possible more then one factors is contributing to the noise, so I recommend keeping the HU wired this way. In your hunt, you might have done everything known to fix the problem but if not in the right sequence the noise might still be there.

Start at the amp and work your way back, use logic and process of elimination, its the only way to isolate the problem.

 

[Eldorado 5,000+ posts]

I used 20ga, im not going to use 10ga, its way way way to thick, the h/u doesnt even power any speakers, pulling 6A max.

Ive tried everything....when we say never ending.....its never ending.

Ive done every possible thing i can think of and the ones you guys posted, nothing has worked except for the external battery.

I checked both with a DMM....mad voltage fluctuation.

Varies from 13.5-13.8, never constant with nothing turned on and car at idle.

So right there im thinking its the alternator, it should be a constant voltage and no variations.

 

[knukonceptz 10+ year member]

20 Gauge - exactly my point. For reference our KRY1.4M RCA uses a 19 gauge ground, which will yeild a less resistive path then 20 gauge Power Wire, Thats my reason for using 10 gauge. It is NOT about the draw, it will guarantee a LESS resistive path then your RCA Cable. 12 Gauge should do as well

The fluctuation - does that same voltage fluctuation occur at the Battery? How about at the ALT? If not sounds like a connection problem

 

[Eldorado 5,000+ posts]

How does resistance cause a whine. Id like an example

Didnt check the battery

The alt...unless you have small girlish hands you wont reach it.

 

[azbass 5,000+ posts]

take some mu metal and wrap it around the hu. ground the hu to where the amp is (if not already tried.).

twist all your wires. some ideas.

never had noise in thoes cars.

 

[Eldorado 5,000+ posts]

Probably because the alternator wasnt messed up.

Others are convinced otherwise

 

[azbass 5,000+ posts]

was there noise before the system install?

 

[Eldorado 5,000+ posts]

I think it was there after his first memphs belle fried.

Probably drew a nice amount of current from the alt and did something to it.

 

[azbass 5,000+ posts]

cars uner warrenty right? take it back and get a new alt.

 

[Eldorado 5,000+ posts]

Thats what i told him to do a long time ago. He refuses to.

Yes, its under warranty

 

[azbass 5,000+ posts]

He refuses to.Yes, its under warranty

hmm,. wont solve much lol

 

[Eldorado 5,000+ posts]

I know //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

 

[knukonceptz 10+ year member]

How does resistance cause a whine. Id like an exampleDidnt check the battery

Resistance is what a ground loop is, it is the difference in voltage from one electrontic component to another caused by resisitance. I said that in the first post. The HU or amp is using the RCA cable to obtain power from one another and that causes the whine because the resistance in the RCA cable is lower then the ground to one of the components. That is the basis of a ground loop. So you need a less resisitive path then the RCA to one of the items.

Now you mention a fried amp, was the amp replaced or repaired? have you tried other amps in the same car?

 

[Eldorado 5,000+ posts]

Replaced, no I dont have a 4ch amp i can hook up.

My money is on the alternator, not the equipment

Unless anyone knows alternators that make noise that only have 20K miles on them

 

[Kickerkitty 10+ year member]

cut the heads off two chickens and dance ***** around the charger, spin until you fall and throw the chickens in the air while screming 'MARSALA!', drink three cups of water and stand on your head. Your problems will be fixed.