Fuel Pump Issue

[Gravy]

Removed the rewire and ran straight from battery to fuel pump for testing as well to eliminate anything from point A(battery) to point B(Pump). This post IS the cliff notes. I've tried all three pumps i have(Stock, 190 and 255 walbro) in and out of the vehicle, all three give the same results. And the pump works 100% of the time when the ground wire is supplied directly to the pump, but when the whole assembly is bolted down, i get nothing. Positive is fully covered and there are no exposed wires on it. I've got it working as of now, but with only three bolts holding the fuel pump in the back on, with one more holding it down with electrical tape between it and the mounting plate. Remove it, and the electrical tape it's fine. Put the bolt back down with no electrial tape(metal on metal) and i get nothing. I laughed so hard workin on it i started to cry.

Thanks for the idea though, i'll be checking voltage(resistance and ground) soon as i get a volt meter to rule out a bad wire on either the positive or the ground.