I unplugged the freezer. The defrost timer was in the back, down below on the left. There were 2 Phillip head screws that held the defrost timer to the freezer. Then unhooked the wire harness from the old defrost timer. I put the wire harness to the new defrost timer. The new defrost timer was easier to put back because it’s all plastic and it was its own bracket. The old defrost timer had a metal bracket so that the defrost timer could be taken off the bracket with 2 Philip head screws that screwed to the defrost timer itself. The new defrost timer was all in one and all you had to do was screw the defrost timer to the frame of the freezer where the old bracket was. It was very easy.