Thanks, my Santa Fe is running again!
I'v had a crank no start problem for a month and a half, and done many attempts at troubleshooting.
But I checked the [ECU B+] fuse passed continuity, light test , and voltage drop tests and fuse socket, had power. But, while I was there I checked all fuses, key on position, when I pulled [50A IG] fuse the fuel pump relay started clicking, but something else was clicking too. I pulled fuel pump relay and some other clicking was coming from the big ECU Relay, when I touched it it was loose, partly seated and partly not. I shoved it down good, then put fuel pump relay back it. I found that if I pull the IG fuse and put it right back, it resets the 2 second fuel pump priming sequence and relay clicked on, then clicked off after 2 seconds. So, I turn the key to start, and WOW, it fired right up. all systems go. SOLVED