How to Repair Christmas Tree Lights: Step-by-Step Instructions and Pictures

by Brett Martin
Find and replace burned-out Christmas tree bulbs using inexpensive testers and other techniques. Read an overview on how to repair christmas tree lights.
From The Family Handyman
How to Repair Christmas Tree Lights-Step 2
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Second, test the bulbs with an inexpensive tester (less than $10), available where holiday lights are sold and online. Usually, changing a problem bulb (or tightening it) will fix the entire strand. The tester will indicate which bulbs are bad and need to be replaced. (For the tester to work, the lights must be plugged into the electrical outlet correctly—the narrow “hot” blade into the narrow slot and the wide neutral blade into the wide slot.)

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