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Long story short, i swapped a blown 7.3 idi with a efi 4.9. I put in a pump and im running the wires. I found a spot where the fuel pump relay is supposed to go but there is no wires going to it. When I did the swap I grabbed all the engine wires from the donor truck and swapped it. I guess my question is, where should I plug my positive and negative cables coming off of the fuel pump? I was gonna run it into the relay but I can't find the harness that plugs into it. Should I try to find or make the harness or would it be simpler to just run a switch to the dash?
First pic is missing harness second is all the other wires if it helps
There are a few relays that im not sure what it goes to. One has a green harness with a yellow, green yellow, red, green red wires. The other has a grey harness with yellow, brown white, black, and brown wires. Are either of these the fuel pump relay wires?
I apologize it is a 90 f350 7.3 idi with a 90 f150 4.9. All engine wires were swapped over. I have a green relay labeled fuel pump in the black case where the other relays are but nothing was plugged into it. There is another relay in that area with a green harness and a black relay on it. I think the green harness might be the fuel pump wiring but I can't find wiring schematics to match the wire colors to be sure.
