wire diagram interior fuse block to battery

2000 Pontiac Grand Prix GTP power windows, radio, sunroof don't work. No power to window, radio fuse on interior fuse block. fuses are OK. BCM Faulty? What is between the under hood fuse block/Battery and the interior fuse block that would cause the above items to have no power ? Looking for a wire diagram/schematic that shows the battery to the interior fuse block specifically the power windows, radio, and sunroof. can you help ?

Thanks, Don