Did 318 intake, fires but won't start

New development. I wasn't seeing any power at the input to the ballast. I messed around with the terminal and got power. I hooked the jumper and had power to the other end of the jumper. I plugged it in to the output and lost all power, in and out. After a few seconds I got power again. I plugged in the ballast and got 12v in and 7v out. It started and died. However, While I was cranking, I held it in crank mode and goosed the gas. It ran and revved just fine until I let off the key, then it died. I checked and there was no in or out power at the ballast. What feeds the ballast? Is there a breaker or fuseable link in line somewhere? Anyone have a wiring diagram?