How To: Wemo Light Switch Installation No Neutral Wire. We teach you what you can do if you don’t have a neutral wire in your existing switch boxes but still want to install a Wemo light switch. There are four alternative options for installing a Wemo light switch with no neutral wire. We tell you how you can add a neutral wire to your existing switch box so you can install a wemo lights switch or use another smart light switch that has all of the same features as the wemo light switch but does not require a neutral wire. If you don’t want to do any wiring in your home and you don’t have an existing neutral wire you can also you smart light bulbs like the phillips hue light bulbs instead of the wemo light switch. We teach you how you can connect any of your smart light switches to Amazon Alexa for full voice control of your home.