Hi looking fo little help, have a1989 Elddis Ducato Autostrada. Went away an the rear view camara stopped workimg though ok blown fuse fix when home. Got back no blown fuse. Found an unrelated one 30amp blown added by a previous owner so replaced it popped dash back in and the battery light, oil light and brake lignt stayed on....oh and rear view still goosed. Obviously the battery started to drain out, went looking for a blown fuse or short no luck popped bonnet and the 25amp fuse off battery positive terminal in box next to battery blown it then snakes off to god knows where replaced it blew again.

Any ideas folks....

Ther is also a weird silver grey box behind dash with a 4 connectors blue green blck and what looks like a GPS ant attached could be alarm but its never gone off...