I replaced altenator on 94 celica now it's over heating why

What is your question?

I replaced the altenator everything was fine The 3 prong plug broke now all of a sudden I'm driving and look down no lites were on but temp gauge was all the way no bubleing no sign at all I pulled over no signs I take off it dies the fans were not coming on eigther so I'm at a loss with this I am inclined and very knowledgeable bit to know specifically what or why I'm lost can u please help me