A recent message said that while I am on the road my truck is actually not doing very much charging of the batteries in my 5'er. The trailer carries two group 27 deep cycle batteries. The poster sai...
I have heard of people running a 8 gauge wire, thru a relay, to the battery. To replace the smaller wire. The relay would be activated with a line to the ignition to cut off power when the truck is shut down.