Slice open a spare length of cable that is 6 inches long with a utility knife and remove the black and bare wires. Shut off the power to the circuit.

4 Way Switches Electrical 101
How to wire two switches to one light. Turn off the power to the light circuit at the main panel. Begin by installing the feed cable from the power. Remove 12 inch of insulation from both ends of the black wire. Twist the ground wires from both ends together and fasten with a wire nut. Connect the white wire from the source to the white wire or silver screw on the light fixture. How to wire two light switches with one power supply step 1.
At the end of the insulation on the white wire leading to the first switch wrap a small piece of black electrical tape. How to wire two switches to one light fixture step 1. Tag or otherwise mark the circuit breaker to alert. Cut 4 inches of sheathing from the ends of all the cables with a utility knife. Use a circuit tester to verify that the power is off to the circuit you are. Install a double switch wall box and run the feed cable.
I have a wiring question that i hope you can help me with. Strip 34 inches of insulation from. One switch will be located outside on the porch and the other switch will be on the inside wall next to the door. I want to install a light fixture on my back porch and use two switches to turn it on and off.