aftermarket stereo wont turn on!

I bought a head unit off ebay, went with the aftermarket harness from autozone, wired it up and nothing, won't turn on. I figured since buying it used it probably was dead so I took my pioneer out of my TA to try and it's the same thing, no power. I did hook the wires up by color so I assume they're right. Does the chime thing that came from the stock radio have anything to do with it? Or did I miss something here?


A little edit here: I checked the pins on the wiring adapter and they don't all line up with the factory harness? On the speaker side they're ok but on the power side the factory has 2 pins top/bottom, but the adapter has 4 across the top. Does anyone know what's going on here?
Thanks

what year truck? on my 05' when i put in my aftermarket stereo I had to run a ignition switch to my fuse box, The person working at circut city told me to run it to the box under the hood either "IGN A" or "IGN B" there both 40amp fuses (I ran IGN A). Pretty Easy, punched and drilled a tiny hole through the fire wall, ran a wire from my power source from head unit (i think it was the red wire on the Sony) to the fuse, sodered it, then back at the head unit I cut the the wire and threw on a on/off toggle switch because its always on when on these fuses, but I never switched it off, so I took it off and ran it straight and threw my remote wire for amp on /off toggle.
This picture is under the hood, on the far left you can see the silver wire that i ran, if you were just to look under my hood you would never notice it. http://i41.photobucket.com/albums/e261/knogoodidleft/Underhood.jpg Yeah i know its pretty dirty..blah:frown:
This picture is the fuse that i sodered http://i41.photobucket.com/albums/e261/knogoodidleft/fuse.jpg
and this is the finish, stock head unit is a deck and a half, and the sony is only one, and the wal-mart converter peice has a nifty little space for stuff and this toggle fits perfectly tight in there :) http://i41.photobucket.com/albums/e261/knogoodidleft/Toggle.jpg

Oops, dummy me was in a hurry typing......It's a 2004 silverado non bose/on-star setup

IF it were me; I'd get a harness from crutchfield.com
I've never gone wrong with one of their harnesses and they give you free wiring diagrams with the harness so you know what each wire is (In case you need to test with an ohmmeter later)

Good Luck.

-Tom D.