Kenmore refridgerator 78285892 Freezer light...

Question

This fridge is probably 10-12 years old. Freezer on top. The freezer light burnt out. I replaced it with a 40w appliance bulb but the light won't go on. Ice maker works, Everything else fine. Also How does the light KNOW when to go on? The freezer does not appear to have a on /off switch that activates when you open the door....Smart light? Thanks Amy