Would this wiring diagram be correct? I have 2 6v batteries wired in series for 12v and bought a truck bed tool box to house them in thinking that one day I may want to go to 4 batteries and this will...
Looks reasonable to me, with the exception that I would very strongly suggest adding (or moving) a main fuse before the positive lead to the trailer circuits. This fuse should be as close to the batteries as practical. I think it's particularly advisable here where the wires are going through a couple of holes and may be exposed somewhat to the elements and damage in general and have more than a completely trivial chance of shorting out at some point.
About Technical Issues
Having RV issues? Connect with others who have been in your shoes.24,331 PostsLatest Activity: Nov 04, 2025