I bought one on Aliexpress that didn't come with a diagram. I ended up taking a picture or scan of the fuse diagram, cleaning it up in Affinity Photo, printing it, and sticking it on the back with packing tape. 3 years later still there no problem. If I ever find that file I'll upload it hereI did exactly that on the Impreza, Got mine on Amazon and there were several "brands" out there. Only issue is none of the fuse diagrams matched exactly what I had.