daihatsu hijet 1300 petrol no electrics at all HEEELLLP

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hi i have a w reg hijet on 50k which has just died one min it was fine the next time i went to start it ws dead i checked the following, maxxi fuse, live wire to the starter, wll the earths, there is no life to the horn or hazards or even the ignition switch or fuse box,

it was that sudden i con only imagine it being a fuse i neeed your help guys