TomGeorge:
Sorry forget Fritzy, use a pen and paper, that way you can show what is really in your project, including pin names and component labels.
Draw and post a picture of your circuit.
Thanks.. Tom...
Okey, here's drawing, hope it helps drawing
Here's picture the whole thing range hood
IR sensors on the side, arduino in the right lamp container and 4 channel relay in the left
EDIT: here's link to the relay, cant find any proper datasheets: https://www.robotshop.com/en/4-channel-5v-relay-module.html