The resulting functional test jig, (video, embedded below ... via pogo pins to a through-hole only test PCB, the full circuit would be completed, if and only if the UUT was completely functional ...

Have you ever used the microprocessor on a circuit board to test itself, either standalone or in conjunction with an external jig? Let us know in the comments below.

I pulled up the datasheet for that relay and showed that it was physically impossible for that relay to fuse, in the circuit configuration it was placed in, with the amount of voltage my test jig ...