I'm an idiot.

[tdhardy]

I've got a 73 Short and Wide that I've dumped countless hours and dollars into and I am now at the stage where all is done except for the stereo system. I ran a direct line to the battery for the amp and dressed all wiring professionally. It tied the alarm and head unit into the BAT terminal on the fuse block and upon plugging the harness into the radio, all went black. No dome lights, no tail lights, no head lights, etc. No voltage on any of the fuses in the block. All fuses are good, but there is nothing coming into the fuse block at all. What did I burn up? Please help. I've got to redeem myself.
Thanks for any input.