I filled my '96 4.0 with a jerry can this morning and seem to have buggered the electrics. First off it locked me out and said "key code locked". I tried the EKA and it still wont start, the electrics wont work, the central locking wont electrically work and all this non-existant faults appear on the dash screen. Have i done the EKA wrong and its immobilised or is it more serious?

thanks for any help

dealership says its a dead battery