My deck ground is run straight to the back, an attached to the amp with the 4 gauge ground. Should I seperate them an make a seperate ground on the chassis for the deck?

 

You deck ground should be connected to the factory harness's ground. You shouldn't be running it back to the amplifier.

 

It was Best Buy lol. I think they were trying to take out my whine from previous. Any idea if a bad stock wiring could lead to whine?

 

Stock will basically never present an issue. It's designed that way. Places like Best Buy are the reason for issues like alt whine.

 

Wasnt them, I could tell the story, but it would be lone big one

 

I really wanna figure out this whine. If you were me, what would you check? Start with ground I know, but where from there?

 

Get rid of that ground, do you have 3 different threads about this alt whine?

 

I had this problem a while back, i played with every type of gound point on the car, grounded everything to the same spot, grounded everything directly to the (-) on the battery and nothing ever worked. Even bought some isolator from best buy to run inline with my RCA wires. All in all it ended up being the deck. So check your head unit before you go too crazy with anything else. Good luck.

 

nah it wasnt the deck. Ill tell the story one last time. Sitting in my car one day, with a pyramid 1000w going to every speaker except my rear tweeters, i was listening to music. Car wasnt on. Then all of a sudden....POP. Then the whine started. Along with crappy sound. Replaced the deck and amp, now I have speakers that have a little static and the whine still exists. Not entirely sure what happened. Would tweeters wine if they were bad? To much power going to tweeters?

 

Honestly there are so many things it could be at this point. Theres no one that can diagnose and/or solve it over the internet. The only way is by trial and error. If it's not one of the things we've told you (those are the most common) then your best bet may be to either just test and run through and check and disconnect and reconnect everything or take it to a good installer and have them check it out.