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It's all about cost. Many US cars have only red because it costs less to run only one wire per light (brake and turn signal are the same filament) and all red lens are cheaper to manufacture. Some cars have a separate turn signal bulb and red lens. When these cars are exported, the lens is changed to be amber. I think we shouldn't have turn signals at all since hardly anybody uses them. Just a waste of money.
posted by 4.158.9...
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