In this video I show the (very simple) process to replace headlights on a HMMWV with aftermarket LED.

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Headlight: https://www.ebay.com/itm/394669722324
Adapter: https://www.ebay.com/itm/232822415961 (typical of what I used)

Code (will make sense in the video):
Blue = 17
White = 18
Black = 16 or 91 (depending on how you look at it)

Thanks for Watching!