Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - Flashing the high beam, both filaments on
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Old 05-29-2005, 12:21 PM   #3
Blurvfocus
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I think if the low beams are on already, then both are on when you use that flash feature, but if the headlights are off, then only the high-beam filiment is goes on. Since it's only intended to flash the lights momentarily, heat build-up in the bulb isn't a problem.
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