I understand the H3 has H13 headlights. I ordered a set of Lumen K1 LED headlights in H13. when I went to install the new lights, I noticed that the 2 harnesses are completely different shapes. the first pic below is the truck harness. the 2nd picture is the harness for the new bulbs. the new bulb harness looks like H13, but the truck harness has a completely different shape. anyone know what is going on here? could the round grey piece with the teeth around the edges attached to the factory harness be some kind of adapter that needs to be removed, then the new H13 lights will fit. thanks

 

Always need adaptor plugs for most LED conversions. Some are readily available from vendors and some you have to make yourself from pigtails or just cut and splice. All depends on which route you want to go or capabilities of figuring out the wiring.

 

answered my own dumb question. the grey piece on the truck harness needed to come out. new bulbs popped right in, work great