Very easy to do, turn off main breaker, take old one out and as you take wire off old one, put it on new one and when all wires, should be 3, a pos, neg and ground. screw switch back in and put face plate back on and your done. I rewired Helen, my grandmothers 201-3 when cord was shot. Like many other things, put the new on the same way you took it off.