2005 G35 - As the title says, when the car headlights are off I have a bright lit up dash board and instantly turning lights to auto or on they turn off completely.

*side note this happened while the car alarm which we didn't know it even had started going off while driving*
So far have:
-Spun the dimmer **** both ways and there was no change.
-Disconnected the battery for extended period of time as I read it resets the computer and can possibly fix this
-Checked some of the fuses but don't know which ones are related to the dash?

My other question is I heard I might need to replace my 'dimmer switch' but when searching online for the dimmer switch it shows the whole control arm where you physically turn on the headlights. Is it that or the spin **** you physically adjust to dim the dash?

Any ideas please help