Hi, my name isXXXXX am eager to help you solve your appliance problems. There is an electronic control in a plastic housing down by the compressor in back. It should be on the left side. The lights are controlled with this control. This control is defective.
You may send additional questions directly to me.
You have to access it from the back lower rear of the refrigerator. You have to unplug the refrigerator and it is mounted inside of a plastic housing, usually white plastic. You will see multiple wires running into this box. This is the control board - http://www.repairclinic.com/PartDetail/Main-Control-Board/W10135090/1394052 This is the cover of the plastic housing - http://www.repairclinic.com/PartDetail/Cover/2255623/1016453 You can order the board from this website or from your local supplier. If you do not feel confident to change it yourself then contact a servicer in your area.