2014 XC 800 fuse box ?

Hello to all, My 2 questions concerning the fuse box. #1, Even though a fuse is blown, there should still be power on one side of the fuse. Is my thinking correct in this? #2, I have power in my fuse box at certain locations, (checked with test light) but not on headlight or accessory location. I’ve swapped around relays but to no avail. When ignition is turned to the on position, the lights in speedo turn on, The unit starts and runs. Could there be an additional fusible link for headlight and accessory position somewhere on fuse box?

Thanks for any help in this matter. Kinda got me stumped ..