I thought I had a good amount of experience wiring guitars. I’ve had much success and custom wired a lot of my guitars. On my latest FB-1 build, I wired the whole works, and one pickup worked, only at full volume. I came back the next day, poked around and everything worked.

I chalk that up to Murcury Retrograde. :-) Everything technical is out of allignment in the universe.

I went through and checked for stray wire threads after reviewing the circuit and testing pots. The kit wire and stock pots aren’t the greatest. I shielded my controls with copper sheet, trying to keep it flat and away from the positive circuit connections. Trying to examine your pictures, I could be completely wrong, but I see your green (ground) wires from the backs of the pots headed to the jack barrel, but no positive wire to the tip? I thought I saw your bridge ground wire heading to the jack, but it’s not clear if it’s on the ground or touching something important.

I would probably ‘bread board’ this outside the guitar to prove the wiring, then install it as a completed harness. Wondered also if your fuzz circuit requires power, or if it’s like the StewMac ‘black ice’ add on chip.

Best of luck! Looks funky.