Where is the fuse for the ac unit lights on a 2003 Lancer Es?

I'm assuming you are asking about the green light on the AC button. Ours is not working also. I don't believe there is a separate fuse for this light. I just pulled the AC control unit out, which allowed me to remove the AC button. There is just a very small LED, which is permanently soldered in place behind the button. We opted to replace the AC control unit, since the heater temperature control know was broken also.