A few possibilities I can think of.
First, if it's a fuse panel with lights that indicate blown fuses, those could show some continuity in one direction. (They're LEDs with dropping resistors in parallel with the fuse sockets.)
Second, if it's connected to (or part of) a converter or charger or something of that ilk, the output rectifiers in the converter may show continuity in one direction.
Third, you have a short circuit that needs fixing.
Maybe a picture of what you're dealing with showing where you have unexpected continuity would help us help you figure out what's going on.