Camaro won't start

I have a 1991 Chevy Camaro Z28: 5.0 liter, 305 engine that won't start. The problem began with the battery dieing overnight so I was told I had a parasitic drain. It also had a loud humming sound coming from under the vehicle (which i'm assuming was the fuel pump) and it wouldn't go off, so I suspected the relay stuck open. So we pulled the fuses one by one and unplugged everything under the hood we could possibly think of and found nothing. We started the vehicle up and drove it a little ways, then once I stopped at a stop sign, it died and would not start again. I looked under the hood and checked the injectors and they weren't getting any fuel. So I was told it would be the fuel pump. We dropped the tank, replaced the fuel pump and the relay hoping it would fix the problem (checked for spark, there is spark) and it still wouldn't start. It will start if we would spray starter fluid in the injectors, but would die right after. So we suspected it was still a fuel delivery problem. We re-checked everything, the fuel pump is still not coming on, we checked for power in the consistant (or any) wire going to the relay and there is no power getting to the relay at all. So at this point i'm convinced it's an electrical problem. The a/c relay is not getting any power, we bought a scanner to see if we could get some codes, and my check engine light is not coming on. But my security light has been on, and when the emergency brake is on, that light comes on. I was told it could be something with the ignition. Some kind of relay or module or could it be just the wiring? Are the relays and check engine wired close together, and where do they go? Any help at this point would be greatly appriciated