yeah when i turn the switch the lites come on. the sound is very similiar to what a large mud tire 35"+ would sound like humming down the road, but i really only hear it from inside the cab, if i roll the windows down i dont hear it?? i also hear it on de acceleration too. ill trey switching in the other 4wd modes to see if theres a diff but as of rite now it doesnt make any noises or feel any diff driving on the street??