dstock
Explorer
Not to Hijack, but the NL Split Charge manual shows both factory pos and neg connected to the main battery.
http://www.nationalluna.com/Datasheets/Split-charge%20manual.pdf
No doubt. I think I need to rewire. Thanks for pointing that out!
I separated the negative cable run that courses through the base of the fuse box and is grounded to the fender and routed it behind the batteries to the same spot. Tidied it all up with some loom and silicon tape.
While I was at it I rearranged the approach to the hold down. I ordered some stainless all thread for the engine side. Rerouted the oba and spod accessory wires as well. Need to shorten one or two.
Overall much better routing and protection for the wiring than I had before. Not to mention wiring the NL proper this time.