2002 haundia elantra radio etc. not working

Can anyone out there give me any insight on a problem...The fuse F25 inside the car blows.. Right now I have no: Radio/Interior lights/Gas gauge/Eng. temp/Door locks...I did notice when the car is on the door locks will jump to the opposit position if attemted to lock or unlock??

Thanks for the reply.. I know I do have a short...Have not spent to much time looking for the problem because of the temp. outsine..  This is Minnesota and yes they do use a lot of salt on the roads..... Next question is, do I need to remove the door panels to check out the connections? 
 
 
                                                                  THANKS....