why does my alternator keep dying on 1996 Mitsubishi Eclipse

bought a new one had someone to put it on for me. when they was replacing it the tool that they were using touch metal and I heard a light pop noise. after that I started having problems with my alternator. my inside lights don't all come on and I have no brake lights

1 answer 2 comments
That is a rookie mistake not to remove the battery cable first thing! Check all fuses.
I know I don't no much about cars but I did know that, I was just trying to get it done for a cheap price never again will he work on my car
I know what ya mean.