Fuel Pump Issue, Fuel Pump will not run Options

[dralf]

Foe the past few weeks I have been replacing components in an effort to resolve my intermittent running issue. Today after my last cleaning and securing many electric connections I tried to start my 75 D jet baby. Much to my disappointment it did not start. I soon realized I did not hear the fuel pump run as I turned the key. I replaced what I think is that relay (red in my picture) for with a meter I saw the pump was not getting any power. The new relay did not fix the problem although I though I heard some noise as I fumbled trying to get the relay pins in the correct slots. I thought I would check the pump for good measure and ran 12 volts to it directly and it did not run. So it appears that not only am I not getting power to the pump but the pump will not run also. My question now is how do I check to see if the relay board actually has power to the relay slots ( which holes do what ) and then why does the pump not work being hot wired. I only ran a positive wire to it, for it looks like the ground is always on. Does the pump not run if it reaches pressure. Just an added note, as part of my repairs I replaced my ignition wire harness with one from Bowlsby. Any help in my trouble shooting is appreciated.