Dan, sounds like even though the voltage is there the line can’t carry the current. Time to work your way back. But, first, is the relay good?Smart people hear this and help.
I’m getting power to the truck female connector that plugs directly to the top of the pump/bucket. However when plugged into the pump nothing happens.
If I Hotwire a battery directly to the male connector on the top of the fuel pump, the pump comes on.
However, if I jump wires directly from the male connector getting power to the female connector on top of the bucket nothing happens.
It acts as if when the power and ground from the truck harness connects to the pump they zero each other out. I multimetered them directly before touching them to the pins on the pump and they had power. Once I touch them both to the pump they both read nothing.