Wiring Up A Double Light Switch. Review the diagram below for basic three way wiring instructions. White black and red plus a bare ground wire.
If your wires are not. Review the diagram below for basic three way wiring instructions. Connect one wire to the first switch in the box and the second wire to the other switch and connect the black wire from each of the lights to the other terminal on its respective switch.
Ensure that none of the wires are touching metal.
You re going to need to test the wires now and if they are. In position 2 when the switch is up or off com and l2 are connected together. Connect the wires to the new 3 way switches with ground screws using one of the two wiring diagrams fig. To switch from two locations youll need 2 two way switches and wire them together in a particular way.