E brake switch and electrical system short?

This past weekend I was boondocking for three days.. the fuse on the group 24 battery (I have a 24 and 31), blew on day 3.  Since then, when I turn bat cut off switch on, the fuse blows.  I also cannot have shore power unless the converter fuse is out and it is not blown.  Could these problems relate to the e brake switch?.  I was checking the brakes and I am having a hard time pulling the pin out and the switch looks damaged a little melted...