I had a battery completely die inside my mustang, so I tried to jump it. The jump box didn't really work. The second the ground touched metal (where I was placing the ground) the car alarm starts going off in a faster interval than usual. Scared the crap out of me, so I gave it up and went to work.

Next day I try it again with a full charge on my jump box, but this time nothing happens. Nothing at all. So I was recommended to get a new battery.

The next next day, I drop in a new battery...

1998 mustang GT Battery and anti-theft problems