I've been using these for a few days now and they work amazing. Driving on my dark roads without streetlights is very helpful. But the description made for this product states that it is suitable for both high beam and low beam. I bought them on purpose to replace my high beam, but they didn't work because for some weird reason my high beam didn't pass current through them, and when I connected them to the low beam, they worked perfectly. In short, they're great for your low beams on a 2004 or lower Jeep Grand Cherokee, but for some reason they don't work for high beams.
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