Dimmed Backlit Dash and Radio/HVAC Lights

[EddieC]

I just replaced the Head/Fog Lamp switch (with oem) and all the functions work but the intermittent dim problem persists.
Is there a light sensor somewhere? I see a little dark half sphere far forward on the dash that may be it, but I hope not because it must be inaccessible from below.

 

[mikez71]

I removed my front panel to pop the sensor out..
definately not accessible from below or through the radio hole..