Been working on my new zap project. So when I got it. The starter, ignition switch, and both battery cables were missing. I replaced all those. Drained the tank and replaced all vacuum hoses and plugs and wires. New fluids and is now cranking but no fuel pump working. I bypassed the wiring and got the pump working. So tracked down the fuel pump relay and took it appart all looks very clean. Then read the maf controls the pump for safety. I tore it down and all looks clean and good. I hooked a test light to check for power at the first two posts as the first 2 complete the connection for the pump. With the key on when I put the test light in slot 2 of the wiring side plug the pump kicked on a few times now doesn't. So went looking for other issues. I pulled the ecu and it looks new and has a Nissan remanufactured sticker on it. So doubting its that. I read another forum thread with someone having this issue, someone said it sounded like the ecu didn't have its dedicated ground hooked up. Saying it's one of the two large wires on the firewall. So I go out and look and both of my large red wires are cut with no ends on it. Looking at pics it looks like one of these red wires hooks directly to the ground cable and the other to the positive side. How do you know which goes where? Both wires look the same. Both heavy gauge solid red wires. I hooked each to ground to check for fuel pump operation and still nothing. But very hesitant to hook either up to positive to not fry something.