on my 07 ram 3500 during the day you can hardly see whats on the radio and read the overhead very dim but at nite its fine , ,,would that be my lite switch just bought the truck , he said it work till someone clean the interror

 

You can adjust the level of how bright/dim you want them

 

i.ve tried all that at the lite switch un plugged it for about 20 minutes nothing the wheel on the lite switch does change the dash lites but not the radio