The wiring diagram for the 2004 Islandia shows 3 25amp fuse between the main power cut-off and the 3 fuse banks located in the helm. One 25Amp fuse protecting each of the smaller fuse banks. Where are these fuses located? Are they in the engine compartment?
My '00 Challenger also has these fuses you speak of. On mine, they are in the engine compartment just below the main cut-off switch where the thick wires come out of it.