I have an anoyying problem with my car for some reason my guage cluster lights, radio control lights and climate control lights dont work only when i turn on my headlights. I already checked all the fuses and still the problem exixts. Could this mean I have a bad alternator, or could this be because i just installed an underdrive pulley.

 

Your interior illumination is dimmed - adjust with a Instrument brightness control switch
that is located on the left side of the steering wheel, right above the Outside mirror remote control.