sweet 1995 325i convertible

I bought a 1995 325i convertible for my Daugther July of this year. Has run great until this last week when it just stopped. Turns over and will fire with a drop of starting fluid. I let it sit a couple days and it fired and ran perfectly all day....then nothing the next day. I do not hear the fuel pump engage. Lifted the back seat and put a meter on the fuel pump plugs...with key on the white plug reads 12 volts, the black plug 0 volts. I had the key turn the engine over and still registered 0 volts on the black plug....the relays all click when the key is on... I applied 12 volts to the disconnected fuel pump...it runs....now what