I had a similar issue when I installed mine. One of the connections was not making good contact. Re checked and fixed. crimp was not on tight. used improper crimps and did not make good contact. Used correct crimps and great connection. No problems since.
One would work with factory AUX switches the other is if you don't have AUX switches. Actually I think the main difference if you have the ability to hook up the AUX switches from under the Taco or not. Did you receive the three short wire harnesses from factory. Pictured on top row.
The panel is used to reenforce the ARB mounting bracket. The TrailHunter controls are not installed. All air accessories are attached to the air chuck. The ARB is powered on with Stock ACC #3 on the dash.
I would think that you can do a bench test to see if the sending power to lights temporarily on then off then on to duplicate the TH switch might help answer the question? Not sure.