1999 Buick Lesabre won't start

I have a 1999 LeSabre that quit on the road. I was able to jump start it to get home. Since then I not only can't start it, but even after changing to new battery there is no sign of life. No radio, no lights, no horn, no clicks or noises. I cleaned my battery terminals and cables. Could there be a dead short to the starter as when it last started the engine starter made a funny "clang" as it started. Is there a main fusible link and if so where is it? Any help could be appreciated. thanks.