• Share:
Use a Christmas Light Tester to Check Holiday Lights

Find a holiday light problem and fix it fast with this simple tester and repairer. You don't have to test every bulb!

By the DIY experts of The Family Handyman Magazine

Use a Christmas Light Tester to Check Holiday Lights

Find a holiday light problem and fix it fast with this simple tester and repairer. You don't have to test every bulb!

Test and fix bad strings of holiday lights

There’s a way to test (and fix) the entire string of miniature lights without testing each bulb individually. Try the LightKeeper Pro (www.lightkeeperpro.com). It’ll identify and oftentimes fix most problems in miniature and icicle light sets (but not the sets of larger lights or LED lights) with a few squeezes of the trigger (Photo 1).

The trigger sends an electric charge through the circuit to repair internal bulb failures. (The “shunt” in the bulb is supposed to act as a bypass if a filament fails to complete the circuit. If the shunt fails, it knocks out the lights in the section. The electricity sent by pulling the trigger locates and fixes the defective shunt.)

If that doesn’t work, hold down the black button on top of the tester and move the tip along the string so it beeps (Photo 2). Note where the beeping stops, then replace the previous bulb.

The tester is available at home centers and some hardware stores for about $20 (find retailers on the company’s Web site).

Back to Top

Comments from DIY Community Members

Share what's on your mind and see what other DIYers are thinking about.

1 - 1 of 1 comments
Show per page: 20   All

December 14, 4:13 PM [GMT -5]

This is easy but if you have a prelit tree and the it is already decorated, this is a difficult task even with the pro- tester.

+ Add Your Comment
closeX

Add Your Comment

Use a Christmas Light Tester to Check Holiday Lights

Please add your comment
closeX

Log in to My Account

Log in to enjoy membership benefits from The Family Handyman.

  • Forgot your password?
Don’t have an account yet?

Sign up today for FREE and become part of The Family Handyman community of DIYers.

Member benefits:

  • Get a FREE Traditional Bookcase Project Plan
  • Sign up for FREE DIY newsletters
  • Save projects to your project binder
  • Ask and answer questions in our DIY Forums
  • Share comments on DIY Projects and more!
Join Us Today
closeX

Report Abuse

Subject
Reasons for reporting post

Free OnSite Newsletter

Get timely DIY projects for your home and yard, plus a dream project for your wish list!

Follow Us

Featured Product

Buy Now