How to Replace an Electrical Light Switch

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By Sandra Mireles
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Parts to a light switch and toggle switch

Changing a malfunctioning switch for a light that no longer works is a relatively easy task. You will find clear and direct instructions.

Difficulty: Moderate

Instructions

Step 1

Turn the electrical power off at the breaker box before you start work. Most breaker boxes are labeled as to the area of the house each breaker is connected.
Step 2

Single Toggle Switch

Unscrew the cover plate from the wall. A single switch will have (2) screws; a double switch will have (4) screws and so on.
Step 3

Remove the bad switch by using a screwdriver to remove the (2) screws. One should be at the top and the other directly below.
Step 4

Pull the switch out as far as you can without pulling apart any other wires.
Step 5

Usually, if this switch regulates a light or receptacle ONLY at this point, it will have (2) screws on the side. Loosen these screws and remove the wires. You should have (2) black wires and (1) that is completely bare (not covered with insulation). Separate the switch from the wires.
Step 6

Use this switch (match to type) to purchase your new switch from your local home improvement store.
Step 7

Place the toggle switch on the OFF position on the new switch. This will show you which direction to place the switch. Reconnect the wires on the side. Make sure the bare wire is on the GREEN screw.
Step 8

Make sure your connections are tight. DO NOT OVER TIGHTEN.
Step 9

Gently tuck the wires back into the wall box and remount the switch to this box.
Step 10

Light Switch

Replace the plastic cover plate and turn on the circuit breaker at the breaker box.