Xtypeeeeeee

i was outside my house working on a friends car and randomly heard my xtypes engine fan rev up. thought was weird because key was not in or near car. came up with security failed on dash. started the car in the hopes it would fix it, and it wouldn't turn off at ignition at all, only way was to disconnect fuel pump relay and unhook battery to stop power going to dash and lights . have checked all fuses/relays. and just cant figure out whats wrong with it. perhaps ignition barrel? or worse?