Battery protection

[Eagle6.7L]

Kirwin,ah yes the BCM,versus the batteries,versus the trailer's lights,so it is a good thing that if we walk away with lights on within a certain time frame (is it based on the 8.4AN settings for (lights on after door locked) is the question.The PDC logic is such that if will allow the trucks batteries to go down when connected to the trailer,so plug out at night when park in remote setting with no hook-ups.I mean I new it was hot,cause I checked the voltage when we bought it,and at the female connector locate in the bed showed it was hot with key off.