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How to Convert H3 Bulbs into H3C Bulbs
1990-1994 Lexus LS400

By LexLS.com

Before doing anything read my disclaimer & safety info.



This is very simple and only takes a few minutes. Instead of using expensive and hard to find H3C bulbs you can use H3 bulbs, which a re much cheaper and easier to find. I bought these H3 bulbs on Ebay for less than $20 including shipping. I went with standard 55w bulbs. They look so much better than the stock halogen bulbs! A special thanks goes out to ClubLexus members persian451 and Lexkost for bringing us this conversion.

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Tools Needed:

Parts/Supplies Needed:

1) Make another wire for the H3 bulb. Use a small piece of wire and crimp a spade terminal to one end and a small ring terminal to the other. The H3C bulb has two terminals and makes a continuous circuit. The H3 bulb does not, so we need to add this wire to make the H3 bulb work.

2) Remove the fog lights. Remove the three screws circled in red that hold the fog light in the headlight assembly. Instead of removing the entire headlight assembly I removed the two bolts circled in green and lifted up slightly on the assembly and pulled out the fog light. Disconnect the wiring.

3) Remove the H3C bulb and replace it with the H3 bulb, perfect fit. Now unscrew one of the two screws shown, place the ring terminal on the screw and screw it back on. Put the dust cover back on the fog light.

4) Connect the spade terminals to the foglight wiring harness and then put the fog light back and screw everything in. The order of the wires is not important. Test them out!



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Last revised: Sunday, 29-Oct-2023 15:46:28 EDT