I got a walbro in line and Nelson fuel pump harness. They didn't send any instructions and I want to put it on this weekend. It has one red that has a fuse close to the end. I think this goes to the back of the alternator, another red( to pump), two grounds( grounds = one to pump and one to frame), and
one light green,( maybe fuel pump fuse that is in the engine fuse box??????)

Thanks for any help

 

Don't wire anything up to the alternator - use one of the accessory terminals inside the electrical / fuse box. Other than that I don't know for sure, but it sounds like the red wire is for power (connect to accessory terminal), the green wire is for relay turn-on (connect to stock fuel pump wire), and the ground is the ground. The Walbro gets one red and one black wire. Hopefully someone else can say for sure.