No lights on air conditioning switch at night

[CTScott]

Originally Posted by wuxiao0715

Then, something must be broken.

I tuned the dimmer rheostat, there're still no light. And the light on the dashboard doesn't change too

If the brightness of the instrument cluster lights does not change when you adjust the dimmer rheostat, then either your headlights are not on (the headlight switch needs to be on to trigger the illumination of the AC knob lights) or the dimmer rheostat is bad or unplugged.