Show pic of your switch. The newer switches have an extra tab that was added in recent years. It's an added ground. You can see it on the *** end in this pic. Pic is a general reference pic.
Even my "old switch" has that ground spade.
I bought a new switch that looks the same, because I didn't feel that the dimming function was working well.
But even after a hour of playing with the knob and prong button while watching TV, I never could get the knob in.
So just went back to the old switch. (ANYONE NEED A HEADLIGHT SWITCH???)
:rolleyes: