Instrument panel backlights out, including climate control, gear select, etc.

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Hello, The back lighting for the instrument panel, climate control, cigarette lighter and gear select are out. Just went out while driving on the freeway, and has never come back on. Things I checked: -Fuse #21 =ok. -sunroof still works (on same fuse) Could it be a bad ground to the instrument panel? Haven't yet explored under dash, any suggestions would be much appreciated!