Quick 6.4 pump install question.

[dohcter]

Putting a 6.4 pump in the truck. When you wore these up do you use a relay tripped by the original pump wire? Or just solder them together and have both pumps run off the same wire? Thanks psa

 

[ford rules]

Id think youd be better running it off another relay. I surely dont think it would hurt it to do it that way.