3 Wire Vs 4 Wire Light Switch. Put a piece of tape on the wire that goes to. (1) it carried the return current back to the source for the aforementioned 120 volt appliance. In box 1, disconnect a wire on the old switch and attach it to the correct terminal on the new one.
These are (probably) one black incoming line wire one black you must arrange the supply of a neutral connection as the fourth wire to the device which you have purchased.
They will usually be colored one black and one white (potentially with black stripe). There are also faster variants with even more wires. Two of the wires will be the current carrying wires that power the light. I think this goes to the light fixture. In the below wiring diagram, the phase line is connected parallel to the light switch and the plug socket switch. Wiring multiple 12v lights to a 12v switch is just as simple as connecting the positives to positives and negatives to negatives and installing a spst switch hopefully, you now know how to wire 12v lights and switches into your diy camper. They will usually be colored one black and one white (potentially with black stripe). Take note of which wire is which as you disconnect them to avoid read the smart light switch's instruction manual thoroughly to ensure you understand its wiring and setup.
