Six steps to install H4 LED bulbs

December 23, 2022 by lytton
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  • Step 1: Unplug your stock incandescent headlight bulbs from their harnesses and remove them from your headlight housings. You may now do a preliminary test on your H4 LED headlight bulbs to ensure their optimal operation.
  • Step 2: To remove the base screw on each LED bulb, use the Allen wrench. To remove the base, twist and pull.
  • Step 3: Install your headlight housings with the baseless LED bulbs.
  • Step 4: Insert the rubber dust caps.
  • Step 5: Reattach the heatsink bases to the LED headlights using a twist lock. Don’t forget to tighten the screws you removed

  • Step 6: Connect your H4 LED headlight bulbs to the factory harnesses and tiny ballasts to complete the installation.

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Hello everyone, I am Lytton. I have been working in car lighting for nearly 20 years. I am willing to introduce my knowledge and experience about LED car headlights to everyone, and I hope to have more exchanges with you.