[DonutHands]

and it decided to go away on its own yesterday. wtf man.

i just know its going to come back when i dont have any time to fix it.

 

[bcramer]

and it decided to go away on its own yesterday. wtf man.

i just know its going to come back when i dont have any time to fix it.

Things don't just go away.

Something changed, in the root cause of it... You just don't know what that is yet.

 

[DonutHands]

yea, and i cant start looking for somthing that isnt there. gah!

 

[gijoe]

I think this is the perfect example of the saying: "it's the thought that counts." Just thinking about fixing it, fixed it!

Just kidding. I would still pull it apart and see what you can find. Maybe re-run your grounds, if the problem doesn't come back then you're good. If it does, then you'll have to try again.

 

[keep_hope_alive]

what make/model of your head unit and amps?

Pioneer has a notorius alt whine issue that is eliminated if an RCA shield is grounded.

Poor grounding can also cause alt whine.

 

[bugmenot]

The whine is A/C from the alt leaking into the regulated D/C. Check the negative to block connection, and negative to chassis connection. May have an alt going bad; burnt diodes. A BandAid is to place a 50V, 1000uF cap across the powers and grounds. Fix the source problem.