Glad you got it figured out, sorry anything I mentioned did not work. I have not checked out why mine works without a converter box, must have something to do with a seperate lighting system I installed in the back lights. It only makes those lights work when we are towing. If I Want parking or "marker lights", I have to turn on those lights in the jeep as we tow. We try not to drive a night for that reason.
Monty & Janet - 2007 Alpine APEX 40 MDTS
S/N - 75715 - Retired - Master Certified RV Tech