RV Repair: Electrical, positive cable, loud pop

Question
Replaced the deep cycle house batteries and accidently switched the batteries and heard a loud pop.  I have no power inside anywhere.  Any help?

Answer
Paul,
    It sounds like you may have blown a fuse or damaged a battery disconnect.  Follow the positive cable from the battery and see where it goes to.  Any place that it makes a connection with something (like a fuse or disconnect or ?) check for voltage.  You should be able to determine where you are losing voltage that way and locate whatever is at fault.  I hope this helps and good luck with your repair.

Darren