Have you ever wondered how a turn signal worked? Or how it was able to turn itself off after your turn was complete? Me neither. But someone at WCVB-TV in Boston sure did. They posted "content" from HowStuffWorks.com about the ins and outs of turn signals. Everything from thermal flashers to turn signals in side view mirrors is covered here. If you make it to the end congratulate yourself by cutting someone off on the highway, signal ablaze.

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