Crap, sorry I didn't put that in the parent. 1987 760 Turbo+.

Interesting that you mention sixteen--I don't think fifteen or sixteen were getting power today when I checked them, but I could be wrong. And, the ground that's coming out of the bottom of the tray is connected to a blade directly beneath fuse sixteen.

The 30A fuse in question, though, is routed back into the relay tray--it's in the middle row, second from the right. It's taking an empty space. Do you think he routed 15 and 16 (both 15A fuses) to this one 30A?

Ultimately, we got everything working again--it was a faulty connection between the wires leading up to the mysterious fuse, so a little solder and shrink tubing later, I've got all my accessories back.

I'm still wondering about that extra fuse, though...