Fuel tank pump issue, level sender issue

[Collie]

2006 4.8is 2/1006 build date..

I figured I would ask before I spent more money. Vehicle started one morning ran for a second and quit. Crank, no start. Okay. Needs, spark, fuel, air. Fuel gauge reads 1/4 tank, but I don't hear fuel pump. Spray starting fluid in intake it starts. Got to be fuel pump issue. Pull rear seat, pull connector and test for voltage, no voltage to pump. All pump related fuses good. Switch horn relay with pump relay, same part, still nothing. Put voltage to pump and still no pump. All these test done alone, I really could have used a second set of hands. Figured I would just pull the pump out anyways. Put voltage directly to the pump out of car, no pumping. Figured previous test due to me being alone and not getting good connection and pump was bad. Ordered new electric pump and replaced it. Was going to put it back in and realized their was only a little fuel in the sump of tank.. I thought back since I had just parked it when the problem arose and think I had put fuel in it soon before this happened. So I thought maybe bad fuel level sender. Plugged assembly back up out of tank and manually moved float from full to empty position, never registered empty. Thought, okay, bad sending unit. Then I looked on real OEM to see the entire in tank assembly. It appears to show a line connecting to the right side assembly around the fuel level sensor, mine doesn't do that nor have somewhere to attach..? Searching online in a few places it appears there is also a level sensor on the left side..?

So, after this novel I just wrote explaining where I am. My questions are. Is there a sending unit on the left that works in conjunction with the one on the right for fuel level? But also, and more confusing. How is the fuel transferred across the fuel tank hump to the from the left to right side where the pump sump area is? The real OEM diagram makes it more confusing showing the line from the left side of tank to the right side connection to the fuel pump assembly which mine does not nor have a location to hook up..?