The problem isn’t the outputs or incandescent bulbs. (All lights are factory LEDs) The problem occurs when the camper is hooked back up to the Jeep after a period hooked to shore power.
Again:
1) The brakes lights work when I park it. It’s hooked up to shore power while in storage.
As soon as I connect it again, I no longer have output voltage from the converter modules (I’m currently on my ninth one. Three different name brands. Different date lot codes)
2) This happens EVEN IF MY OTHER TRAILERS ARE NOT CONNECTED IN BETWEEN CAMPING TRIPS. (It is 100% NOT my other trailers.
3) It has never happened when the camper was in storage WITHOUT being connected to shore power.