Done a little more testing, but not finished yet. Kinda doing this between rain, cold and grandsons! House batteries (2) show 12.5VDC till shore power is applied, then 14.66 The truck batteries, with key off show 12.44 VDC (both) then down to 12.11 when first started (running) After about five minutes or so they then read 14.36 At that point I checked the seven-prong outlet at the rear of the bed. No voltage being read at the spades for aux battery charge. I have not yet changed the relay as Krusty suggested. That will be after grandsons, later today. Not having any problems as such, I just want the truck to charge the house batteries while driving to AK in the summer of '15 Can hardly wait!