Top won't go down on 1992 BMW 325is

I recently put in a new radio and every since I can't put the top of my 325i Converible down also the tachometer stopped working at the same time I'm thinking I might have disconected some key wires what wires do what and how can I fix these problems thanks

Asked by for the 1992 BMW 325is
There is a web site that will have the wiring diagrams for your BMW: