Auto Lights not turning on

[midTnMike]

Like my title says, my auto headlights do not turn on when it starts to get dark out. If I manually turn them on and return the switch back to auto they will stay on. Anyone else had this issue? Not sure if I should looking to replace switch, sensor, or something else.

 

One more more simple question. I just bought the truck so just trying to figure it out. Does the headlight switch have a light on selector like the 4x4 switch or just the white marker? I find it weird the 4x4 switch has a yellow marker light when lights are on but the headlamp switch does not.