its not your alternator cause if its a bad one the car will die while your driving
False information.
Your car will run as long as it has power from the battery. The alternator went out in one of my company trucks which is a diesel (meaning it has 2 batteries). I drove it 50 miles during the day and the truck never died once. Matter of fact it is sitting on the side of my shop and I have moved it twice since. Alternator is still shot.
is there anyway i can re-wirre it not to just the battery but to something else? it seems kinda sketchy just going straight to the battery like that.
It is fine straight to the battery as long as it has it's own fuse. I would unplug it and wouldn't do anything else until you hook one up. If the wire comes off your amp and grounds out it will cause some major damage and could lead to injury.
I can't believe no one has said anything about that hacked up battery connection.
Your positive connection is very corroded and is terrible. I would replace the main positive wire, put a fuse on your amp power wire, connect the amp power wire correctly instead of just shoving it on there and for god sakes clean the terminal post. It also looks like your negative wire is hacked all to hell as well. I would replace that too.
I am willing to put money on the fact that your problem is your connection. A car that is running fine doesn't just have a dead battery after coming out of a store like that, jumping it, and then it is fine again. You have a bad connection. Plain and simple.
If your battery is bad, it will continue to be dead over night or after sitting.
If your alternator is bad your battery won't hold a charge and jumping it will only give you a limited amount of juice.
If you have a bad connection, it will cause it not to start, then when you go and hook it up to jumper cables thinking that is what you need, you are clamping the connection back for a moment. Give it some time and the connection will work loose again and you will be stranded. It has nothing to do with taking your system out or leaving it in.
If your amp is draining the battery while sitting, it will happen over night or over time, but not instantly or within a matter of minutes.