Thanks to the video you shared I realized I had checked the harness for the MAF and not for the ETA. Just went out and jiggled the ETA harness around and was "rewarded" with a bunch of clacking noises from the motor side of the ETA.

Back to an earlier comment of yours: "Have you checked the Delco 10A fuses in the module box? "

There are 4 fuse slots, but there's only 3 fuses present in mine? Is that correct or do I have a missing fuse?