The last couple of days it's been cloudy and rainy enough that my 2010 F250 thinks it's night time so my headlights are on. The weird thing is that my radio and info center (trip, mpg ect...) will get bright for a couple of minutes then go back to the level I have set. The speedo and other gauge lights stay the same. So I did some experimenting by putting my hand over the light sensor and that will cause the info center and radio to go dim, then after 20-30 seconds they get bright again and you can't control them with dimming switch. Any ideas or is this normal?