Why do you not just run a relay and power lines separately. Then use the ignition switch to trigger. I think even xessive makes a kit.
If I’m understanding you correctly, the fuel pump does have it’s own relay and power connection. The relay is triggered by the original fuel pump power line, which in turn is triggered by ignition. my battery is in the trunk and the fuel pump circuit is wired directly to that. I wanted a shorter and significantly larger power line.
The Xcessive kit is $78 for some wires, a relay, and a fuse. Practically speaking, there’s nothing different between what my wiring is doing and what that kit is doing except for being $60 cheaper. I’ll probably just wired the relay to the fuel pump trigger in the Haltech likeKris suggested. I didn’t realize Haltech has a dedicated