Distribution block?

[DFA]

well, awesome.

I just mounted the distro block right where I wanted to, I noticed 2 bolts about an inch apart next to the ebrake, so, I screwed two ... " flat metal rectangles with two screw holes" (my english falls short sometimes, bear with me :P) to the underside of the plywood base I made for the distro block, and put the bolts through the other holes, let's just say it won't be moving anywhere anytime soon =)

Now, for some reason, I noticed my HU isn't sending a 12V signal thru the blue/white cable, I sent a remote turn on cable to the back of the car, checked with a DMM and there's continuity between the HU and the wire on my trunk, but then I turn on the HU and take a voltage reading between it and the chassis, I get really lame and inconsistent readings around 2-3V.
I don't have an amp hooked up to the remote turn on cable, does the HU somehow only send the signal when there's something hooked up?