All of my safety lights on my trailer are powered by the truck alternator setup and start battery and has nothing to do with my trailer batteries being charged...
Converting to LEDs in my case would not give me any gains for charging my trailer batteries.
My trailer does get a minimum battery charge through the Trailer CHG connection on the 7-way connector from the truck side only when the ignition key is ON and when the truck engine is running but it not very many DC amps and is more or less just a top off charge in my case..
My basic trailer battery charge comes from the on-board Converter/Charger unit when powered up by Shore Power or Generator...
My 12VDC Power Distribution Panel for the trailer has no connections going the trailer safety lights.
This is a basic 30AMP configuration for my trailer setup..
Roy Ken
My Posts are IMHO based on my experiences - Words in CAPS does not mean I am shouting
Roy - Carolyn
RETIRED DOAF/DON/DOD/CONTR RADIO TECH (42yrs)
K9PHT (Since 1957) 146.52M
2010 F150, 5.4,3:73 Gears,SCab
2008 Starcraft 14RT EU2000i GEN
2005 Flagstaff 8528RESS