Wiring Diagram for Accessories

[snowmobilejon5000]

Does anyone have a wiring diagram for accessories or anything in a 2008 aveo sv hatchback? My stereo makes my interior lights dim due to my alt is putting out 14.6volts and every time something loud happens the voltage drops to 13 or so on my accessories power lead in the fuse box. My cigarette lighter however does not drop no matter how loud I turn up the volume. This makes me want to re-route the power for my stereo to its own power source. I need a wiring diagram for accessories and if possible a diagram for the entire car. If I put my accessories on a different power source then my stereo then my interior lights shouldn't dim. The other thing that I am concerned with is that the power source is not the problem but they probably all go to the same ground source and that might be a problem. A wiring diagram will help immensely to find out what is bunched with what.

Thankyou,
Jon

[petrified.rabbit]

A better battery will solve this problem sort of. but if you are going above the alternator output, nothing you do will solve the issue aside from a high output alternator.

[snowmobilejon5000]

A better battery will solve this problem sort of. but if you are going above the alternator output, nothing you do will solve the issue aside from a high output alternator.

I already have an optima red top. Do you have any suggestions for a high output alternator of where I can get one?