How to Test, Fix and Change Christmas Lights (DIY)

Introduction

Burned-out holiday lights, even the cheap kind, are often fixable with a small investment in time and money. Here's how to diagnose and fix common problems.

Test, Fix and Change Christmas Lights

Most of us have experienced the frustration of uncooperative holiday lights. After a year of storage, Christmas tree lights often need repairs before they’re ready for use. There’s a simple way to solve the problem. Here, we’ll walk you through how to fix Christmas lights that are not working.

What causes Christmas tree lights to go out?

The most common cause for a strand of malfunctioning holiday lights is a burnt-out, broken or loose bulb. Frayed or broken wires can also cause your lights to fail, so be sure to check that the cords are in good shape. Another reason holiday light strands fail is due to bad fuses, which we show you how to check and change in the steps below.

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