@Step-a-toe Thanks! Haha,
Well, small update. Actually, big update! Got the ECU working! Whipped out my test power supply, did some more fiddling, and isolated the grounds I need to get the ECU going. On my ottoman, in the living room, I was able to get 12V to the ECU, and with the test mode connectors hooked up, My main relay fired! Put 12v to my "switched" 12V annnnnddd FUEL PUMP RELAY is firing. Yay! FINALLY. I still have the SMJ in place. I think it was a combination of a loose connection in the SMJ, and I ran my "Power supply" ground coming to the ECU directly to the power supply source ground I am using, and got it working. So now I know, Ive got a ground off that Ive gotta fiddle with. But, the rest of my harness should be sound! I am hoping to have this thing running soon!