How to Replace Blown Mini Light Fuse

Written by jonra springs
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How to Replace Blown Mini Light Fuse
Keep mini lights burning with replacement fuses (Christmas lights in a wreath image by palmer530 from Fotolia.com)

Mini lights make spectacular decorations for parties and weddings, and they're a standard for Christmas tree lights. Unfortunately, it's all too common to set up these string lights, plug them in and get nothing in the way of light. Many are prompted to buy a replacement string at that point, but chances are the problem is caused by one little fuse that can be replaced at a fraction of the cost.

Skill level:
Easy

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Things you need

  • Slotted screwdriver

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Instructions

  1. 1

    Unplug the string lights from the power outlet. It's OK to leave mini Christmas lights on the tree during fuse replacement as long as the power is unplugged.

  2. 2

    Open the compartment on the plug by sliding the door cover back toward the light string. Use the tip of a slotted screwdriver to force the door open, if needed.

  3. 3

    Pry the tiny cylindrical glass fuses out of the clips in the compartment with a slotted screwdriver tip and examine them for burn marks or broken wire filaments. Discard any fuses with burns or broken inner wires.

  4. 4

    Find replacement fuses in the string lights package. Extra fuses are typically included in a small sealed plastic pouch. Mini Christmas lights come with a blinker fuse that is identified with red paint or other red marking. Hardware stores and home improvement centres stock fuses for Christmas tree lights if the packaged fuses are not available.

  5. 5

    Put the new fuses into the clips in the plug compartment. Close the cover door and plug in the mini lights to test the repair. In most cases, a new fuse will bring the lights back on.

Tips and warnings

  • Wrap a fuse completely in tin foil and replace it as such until you can purchase a replacement fuse. Do not allow the tin foil wrapping to contact the other fuse or its clips inside the plug. Replace the wrapped fuse with a new one as soon as possible.

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