I had problems with it at first, so I was very disappointed. I was so excited to make the switch to LED headlights that my initial frustration diminished my problem-solving skills. I tried my headlights without the anti-flicker adapter and they flickered really badly. I ended up ordering another adapter from the vendor with the best reviews and ratings. In the meantime I've decided to try again. This time they worked after I solved the problem a bit. Here are the problems I found and how I solved them. The first problem was that neither the H4 connector nor the H13 made a good connection. When connecting the H4 from the headlight to the adapter you tend to push out some of the wires a bit but just enough that they don't work. All I did was push the wires all the way into the connector (if the silver comes out of the connector it won't work). Then I made sure that the H13 connector was also firmly seated and that there were no loose contacts. After doing both, they actually worked. I still notice a faint flicker, but you really have to look for it.
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