I think the passing light circuit (lights coming on when you hold the stalk back) is seperate from the runtime circuit. In other words the current is pulled directly from the fuse block through a unique power feed to that's seperate from the power feed that's used for regular headlight operation.
Check your fuses, all your fuses. If your Jeep is like my parent's Tahoe, there can multiple fuses in the circuit, and in any one of THREE different fuse box locations. It's maddeningly complex and the locations are seemingly random, but that's the way it is.
Brad