Google Nest Community

We have the Nest camera wired. Hopefully this will make sense. We wired our nest camera into our existing wires from our old door bell. we saved the indoor chime from the old doorbell . The camera works but however we are struggling to get it to work...

We have three cameras.. two wired flood light cameras and a wired nest doorbell camera. The door bell and back floodlight camera keeps turning off automatically but the flood light camera above the garage stays on.