5.3 fuse block question

[LT1_Malibu]

When wiring up a LSx style harness does the fuse block need to be grounded? I have + battery voltage going to the block and power to all the connections on the C1 and C2 block, but the C3 block is dead and it houses the fuel pump relay. When I turn the key to the "on" position I don't hear the usual "click" noise that the fuse block should normally make when you know its powered up like the one on my 5.3 truck does. Anyone that has any ideas please feel free to LMK.

 

[79loserbluebu]

Does the C3 connector need ignition 12V? I don't think the block itself needs a ground

 

[LT1_Malibu]

To be honest I'm not sure if it needs 12v. When I turn the key to start I'm not getting any power to the pump or the fuse block end. I'm not really sure how to go about doing any more diagnostics. I've read over the past few days the fuse block grounds itself through various connections but I may not have the right ones? I'm pretty well lost lol.