Well, I got it running, but I don't have it fixed.
Unwrapped the harness the full length of the fender. Every factory splice I came across was free of corrosion and not broken.
I figured out that if I ground the blue with yellow tracer wire the pump comes on and the truck will start/turn off with the key (pump remains on though). If I disconnect this ground while its running, truck shuts off immediately. Looking at the diagram provided earlier, the blue with yellow goes back to the ASD relay then on to the ECM. I tried a different relay, with no difference.
(On a side note, this thing hasn't run since May, and it fired up immediately tonite. Kinda surprised me how quick it fired up)
