Thanks!
I got it mostly sorted before our test run last weekend and all my lights work as expected now.
The blue being the charge line makes sense. Has anyone actually connected a charge circuit to the vehicle?
One of the black wires at the connect has no continuity to ground. Is this possibly the ground for the on-board isolator?
I have the setup for a charge unit
I will be using large cable

not the small stuff and use anderson plugs to connect it up with a national luna dual battery kit
so wire to the back of the rig and a plug then on the trailer up to the front near the hitch
then make a length of cable to connect the two !
my ideas really came from talking to some battery experts about larger wire and charge efficiency etc..
and a ton from guys in SA and OZ
the reasons they state and I think are good
never use a 7 type plug for charging and lights
if you get a ground prob you cant charge or use lights properly ? so better have one or the other
the idea of a pigtail type connector between the trailer and rig is if it gets snagged it can pull out with out ripping out stuff
just seems like good thinking to separate the two

so decided to go that route
