2000 cavalier, new head unit disaster

SO i bought a relocation harness to ease the install of my aftermarket stereoin a 2000 cavalier. It was pretty straight foward, just hook up the colors together and go. I went to test the stereo and I realized the new deck was not turning on and the old stereo was still on. After hardwiring the stereo to the battery, i knew the stereo wasnt the problem. So i took a meter across the black and red wire from the relocation harness and found the red wire did not show 12v, but the yellow acc wire did. So (looking back now) being an idiot i just hooked up the red wire  from the stereo to the yellow on the harness and the stereo turned on, but still not working right. So i took the redwire from the harness and hooked it up to the yellow wire and voila, it worked, the relays on the harness kicked on and the new stereo had full control off the speakers. I put the dash back together and went to turn on the car to back it out and it would not start. It would turn on for about a second and then shut off. I tried to do the on 10 min on,off ,on 10min,off,on 10min and that did not work. I checked all the fuses under the hood and the nearest related fuses in the door and found nothing. I swaped the relay with the ac relay and that did not fix it either. I can here what i would imagine is the fuel pump turning on, but not getting any luck here. The car has about and 1/8 tank of gas but i dont think this is the problem considering i drove it the same day.

ANY suggestions would help, my girlfriend needs this car for college.

I tried the anti theft reset, but i didnt try leaving the door open and the key in for an hour. I will def put more gas in to be more sure. Im thinking that module also, where can i get one?

Also, which module do i need to replace

im sorry im not that familiar with that perticular car, but i have seen modules get fried when 12v/ground is sent into a data wire.    at this point i would put evrything back to stock as was suggested by the other poster and start looking for a mechanic you trust.