How to test a dimmer switch

Written by necie reed
  • Share
  • Tweet
  • Share
  • Pin
  • Email
How to test a dimmer switch
(Jupiterimages/ Images)

Adding a dimmer to your room is an inexpensive way to upgrade a home. Dimmers reduce energy usage by lowering the light levels in a room. Unlike ordinary receptacles, a dimmer has wire leads instead of line and load terminals. If you believe that a dimmer switch may be faulty, test the device to ensure that the problem lies with the dimmer switch and not circuit connections. Replace any faulty dimmers with working ones as soon as possible.

Skill level:
Moderately Easy

Other People Are Reading

Things you need

  • Continuity tester
  • Screwdriver

Show MoreHide


  1. 1

    Turn the breaker to the dimmer circuit off at the service panel. The service panel houses all of the breakers to a home's electrical system.

  2. 2

    Remove the dimmer cover plate from the wall using the screwdriver. Disconnect the dimmer from the wires located within the outlet box. Loosen wire nuts and remove electrician's tape from the wires.

  3. 3

    Attach the continuity tester's alligator clip to one of the dimmer wire leads. Hold the continuity tester's probe to the other dimmer wire lead. If the continuity tester's continuity LED glows, the device is working; otherwise, you have a faulty dimmer switch.

Don't Miss

  • All types
  • Articles
  • Slideshows
  • Videos
  • Most relevant
  • Most popular
  • Most recent

No articles available

No slideshows available

No videos available

By using the site, you consent to the use of cookies. For more information, please see our Cookie policy.