Originally Posted by frankcfx
By switching to the LED I believe you masked the problem instead of fixing it. For instance a poor ground connection often causes arcing and increased current draw. If it burnt out the adapter that could also been caused by poor grounding. I am curious as to what "park lights" are.
Well, that would be a good assumption, and one I initially worked with, however, after plenty of testing the light
circuits on the trailer, and then finally working closely with the Curt factory, it became apparent that the amount of lights on the trailer drew more current than the adapter was designed for. Curt finally designed a prototype and sent to me (which worked) however, by that time, I had changed to the LEDs and never looked back. Curt even agreed that it was good idea to cut the amperage draw by going to LEDs.