Well i was havin pressure probs so i bought another holley and swaped it out with the old one only to find that the stock lp is the bad pump. Ok so now i got 2 holleys reb and blue. My question is on wiring them up off the stock harness. I know i need a hot from the battery to the relay to the pumps, i need the hot wire off the harness to the relay. Now what would be the best way to deal with the grounds and the neg on the stock harness? I can do just about anything mechanicly, but when it comes to wiring all i no it put a hot one on it and ground it that makes er run haha but not always safely. so i appreciate the help guys.

 

For mine I just used the stock jumper and spilce it and ran that for the control power and ground of the relay. This leaves the stock harness intact incase there is ever a need to reverse the work.

As for the pump power. I came from the hot side of my heater grid relays. I put it on the rear one and made a jumper between the two hot sides. I did it this way so I would not starve the grids or the pumps for power under any circumstances and the relay stud provided a very clean way to hook up the wiring. Using this you need to put a fuse as close to your connection point as possible.

For the pump ground just run it to one of your mounting bolts.

Randy