So, I'm coming to the end of a BK playfield swap, and have done all the things you're supposed to do but have no power to the right hand flippers. I can't figure it out and it's making me nuts!

I upgraded the flippers as per Vid's recommendation, and this is not my first rodeo doing flipper rebuilding/installation. Everything was assembled on the bench, EOS gaps dialed in, good solid solder joints (I checked them and even re-flowed a couple just to be sure.)
There's current going to the switches, there's equal voltage to all 4 coils, I've got good continuity from the cabinet switches to the coils. The right flippers *initially worked*, but quickly died completely. I don't have the wiring reversed (Upper right - BLUE to banded side of diode, BLK/YEL to non-banded. Lower right - BLUE to banded side, BLU/VIO to non-banded), and the flipper fuse in the backbox is fine, as are the fuses under the playfield (checked continuity through the fuse holder to be sure the old holders were getting good contact. They are.)

The boards are new. I have also done a continuity check from the power lug back to the driver board, and from the ground lug at the cabinet switch back to the board, just to be sure there wasn't a problem with the connectors themselves. Also have continuity in those places.

I am completely stumped. It's probably something dead simple staring me in the face, but I've checked through all the things I can think to. Very strange problem. Help?

I'll double check that in the morning. I tested continuity 8 ways from Sunday and kept getting the beep.