Skip to Content
chevron-left chevron-right chevron-up chevron-right chevron-left arrow-back star phone quote checkbox-checked search wrench info shield play connection mobile coin-dollar spoon-knife ticket pushpin location gift fire feed bubbles home heart calendar price-tag credit-card clock envelop facebook instagram twitter youtube pinterest yelp google reddit linkedin envelope bbb pinterest homeadvisor angies

How To Wire A Motion Sensor To An Existing Light


As a homeowner in zip code 02908 Elmhurst, Providence County, Rhode Island, you understand the importance of maintaining a safe and well-functioning home. From regular maintenance to renovations, there is always something that needs attention. And when it comes to the electrical system, it is crucial to have a professional and reliable electrician on your side.

At B&K Electric, we have been providing top-notch electrical services to the residents of Rhode Island for over seventeen years. As a family-owned and operated business, we take pride in our community and prioritize customer satisfaction above everything else. From electrical repairs to panel maintenance and installation, we have you covered. If you are in need of a licensed electrician for your home or business in Warwick or the greater Providence area, look no further – we are your go-to electrical experts.

One common request that we receive from our clients is how to wire a motion sensor to an existing light. Many homeowners are looking to upgrade their home security system and reduce energy consumption, making motion sensors a popular add-on. This simple and cost-effective solution allows you to have control and peace of mind. In this article, we will guide you through the process of wiring a motion sensor to an existing light, providing you with a step-by-step guide and all the necessary information to make it a seamless and safe project.

Gathering the Required Equipment

Before getting started, it is essential to have all the necessary equipment on hand. This will save you time and hassle once you start the project. The materials you will need are a wire cutter, wire connectors, a screwdriver, a drill, and of course, the motion sensor and light that you want to connect. It is crucial to make sure that the motion sensor and the light are compatible with each other. If you are unsure, it is always best to consult with a professional electrician to avoid any mishaps.

Step 1: Turn off the Power

As with any electrical project, always begin by turning off the power. Head to your circuit breaker panel and locate the circuit that supplies power to the light you want to connect the motion sensor to. Turn off the switch, and you are ready to begin.

Step 2: Connect the Light

Once the power is off, you can start connecting the light fixture to the motion sensor. Take the cable from the light and feed it through the knockout hole in the motion sensor’s back plate. Using a wire cutter, strip about half an inch of insulation from the black, white, and green wires of the cable.

Next, you will need to connect these wires to the corresponding wires on the motion sensor. Black to black, white to white, and green to green. Secure the connections using wire connectors and make sure they are firmly in place.

Step 3: Connect the Motion Sensor

Now it is time to connect the motion sensor to the electrical wiring in your home. First, remove the knockout plug from the back of the motion sensor’s electrical box and insert the cable from the light. Strip the wires and connect them to the corresponding wires in the electrical box using the wire connectors.

Step 4: Mount the Motion Sensor

Next, it is time to mount the motion sensor to the surface of your choosing. It can be on the wall, on the ceiling, or on an electrical box. Using a drill, make the necessary holes and secure the motion sensor using screws. Make sure it is stable and not loose.

Step 5: Test it Out

Now that everything is connected and mounted, it is time to test out your newly wired motion sensor. Head to the circuit breaker panel and turn the power back on. Once it is on, go to the motion sensor and test it out by moving your hand in front of it. The light should turn on and off as expected. If there are any issues, turn the power back off and double-check all the connections.

Step 6: Adjust the Settings

Most motion sensors come with customizable settings such as sensitivity, range, and time. Make sure to adjust these settings according to your preferences. This will ensure that the motion sensor works efficiently for your specific needs.

Wiring a motion sensor to an existing light is a manageable task that can make a significant difference in your home’s security and energy efficiency. However, if you are not comfortable handling electrical work, it is always best to seek professional help. At B&K Electric, we have a team of experienced and licensed electricians who can handle any electrical project efficiently and safely. Don’t hesitate to contact us for any of your electrical needs.


Motion Sensor,

Existing Light,

Electrical Wiring