Thanks for the ideas Steph & OG & GG
Plan to tackle this one today, Going to try a smaller wire first, for this trip, Didn't even think of that, I used #2 wire That came with a winch package. the guys on the overlander forum all use dc to dc chargers, with separate battery banks, so thats my end goal... when I get back east.
I also use this truck as a off grid overlander and I have way to much stuff on the starting battery, (12,000lb winch, 2000w inverter, the dometic cooler, On board air compressor, big LED lights all the way around, And usb/leds/12v ports by the bed in the shell camper, Going into Canyonlands NP backcountry later this week on my way to the east coast,(no rpod this run)
GG, I have the Klien clamp meter, but it's currently on the east coast and I'm on the west coast, My daily carry is a Fluke model 73, 25 years and still doing the job!
OG, Yes it was overcurrent protection, charging the 2nd battery and running the cooler. I have a 240amp alternator so there is plenty of current, The truck just thinks something is wrong and insists on letting me know.
And the deflector works surprisingly well, with the only drawback (on a 180) is the airflow is directed straight at the thermostat , (ten feet away) and it did cycle the furnace off and on a bit more, not alot ,but a bit... But the gain of not heating the now usable for anything space under the bed was worth it,(to me).
Kickhead70, Try the bread pan idea, just cut off one side and screw it to the grill over the front 2 grills. this allows for the cooling vent on the grill to be free and also a bit of heat under the bed.