I'm trying to put together a truck someone else completely took apart.
Trying to fire it and no fuel. Fuel pump is not running.
I traced one of the fuel pump wires to a plug in the engine bay and cannot find where it plugs in for the life of me.. it's a 4 prong square plug. I'm not sure if I'm missing a part or connector or where it goes. Any help would be greatly appreciated. Posting pics too

 

I'm not sure if that's the plug but the fuel pump, coil, 02's and injectors get positive power from the asd relay.

 

Thanks for the reply. I traced the wires to the relay. I think that plug attaches somewhere on the engine/ harness area. I might have to bug someone to let me look under the hood of their truck to see exactly what it plugs into.

 

That 4 wire square plug you have pictured goes to the o2 sensor on the driver side manifold.