In my research on how to install a 3 way switch, i've seen different ways on how to install the wires but i haven't found the schema that would help me in my situation.
Here's a screenshot of my installation.
- The background in green is my current installation
- The background in yellow is what i want to add
- i have access to the wires of my current installation. I can change if i need to
Is there a way to install a 3 way switch like in the schema above by leaving the power source where it is? If yes, a detailed explanation would be welcome!