Car wiring diagrams: Fiesta Mark 5 Wiring Diagram, wiring diagram, wire wiring harness, schematic circuit diagram, wiring diagran, wireing diagram, wirring diagram, wiring daigram, wiring diagrams. Anyone have a wiring diagram and can tell me which of the contact on but I seem to be having earthing problems on my MY Mk Fiesta..Central fusebox in passenger compartment. Ford Fiesta MK fuse box passenger compartment. Fuse, Rating [A], Circuit protected..MK Fiesta Fuse box diagram posted in Ford Fiesta Mk Mk Forum Hi all, Have recently bought mk fiesta and the rear windscreen wiper does not work. link where i procured it from, contains full wiring diagrams ..