Need help with a Dodge Charger question.

35 posts talking about LED lights, but not fixing the OPs problem, which I stated early in this thread is probably worn out alt brushes. They cannot handle the extra load of the Hi beams.
H/light switches get warm because they switch a lot of current & they have a rheostat that dims the panel lights; depending on where this is set, it will also generate some heat. A warm switch is not necessarily an indicator of failure. If the HL switch [ or dimmer sw] was faulty & causing a bouncing ammeter needle, I would expect the HLs to be flickering, & this has not been reported.