Discovery 1 electric problem

Hello im having a problem with my disco and hoping for some help on friday i drove to newark and on arrival no electrics worked appart from indicators. Check the fuses and the main 100a had blown. Drove to work this morning and half way to work it went again anyone got any ideas or common problems with them before i start testing everything cheers kev

Just for starters, if the fuse is blowing as a resuilt of using the indicators and as trailer sockets are known to short circuit, if you have one take it apart clean and grease the terminals.