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Just a thought.... Light bulbs have a certain life span. If you put two light bulbs in at the same time and they get used equally they should burn out at approximately the same time. Maybe the correct answer is more complicated than that, but I certainly would hope not. I would put new bulbs in and see what happens. If the go out in a short while you have bigger problems. I have replace bulbs at home and in my car to have another one burn out just days or even hours later.

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Q: What would cause both headlights to go out at the same time?
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