How to Replace a Light Switch

mediumHome Repair30-60 minutes10 steps

Safety Warnings

Open the main switch at the fuse box or circuit breaker before working on any part of the wiring to ensure electricity stops at the switch.
Keep a flashlight handy to avoid fumbling around electric wires in the dark.
Consult a local electrician regarding safe electrical wiring and connections.

Screwdriver — 4-inch

Side-cutting pliers — 4-1/2-inch

Pocket knife — check locally

Sandpaper — small piece

Replacement light switch — check locally(1)

Open the main switch at the fuse box to disconnect power to the circuit.

Tip: Ensure the power is completely off before touching any wires.

Remove the switch cover plate.

Unscrew the existing switch from the switch box.

Tip: Ensure the switch box is securely fastened to the wall.

Disconnect the wires from the old switch terminals.

Prepare the wire ends if necessary using sandpaper or pliers.

Connect the wires to the terminals of the new replacement switch.

Tip: Check connections carefully to ensure they are tight.

Secure the new switch into the switch box using screws.

Replace and fasten the cover plate.

Close the main switch at the fuse box to restore power.

Test the switch by flipping it to see if the bulb lights.

Tip: If it doesn't light, re-check the connections.

Having the right tools ready before starting saves time and trouble.
If sparks fly when a switch is flipped, it is a sign the switch is not working properly and needs replacement.

Synthesized from 2 verified sources:

Gutenberg: Electricity for the 4-H ScientistView →

Gutenberg: Electrical GuideView →