Okay so I finally got some time and disconnected both the brown/white + red/blue fuses and the blue/white + blue fuses and tested them. No issues on red/blue (0.01v- 0.07v), but on solid blue I get 12v. But from the wiring diagram I think that's running to the headlight, which I haven't removed, but it persisted even after I disconnected the terminals so I'm not sure that that means.
Also-- any idea what this random brown terminal might go to? It isn't the extra brown white and I can't find it on the diagram.