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Which lamp function does a body controller commonly manage automatically?

  • A.Nothing
  • B.Switching on the headlamps when the wipers are operated, which is a legal requirement in a number of jurisdictions
  • C.Switching the lamps on as ambient light falls
  • D.Adjusting the beam pattern, which requires a camera and is therefore handled by a separate control unit entirely

Answer: C

A light sensor on the windscreen triggers automatic lighting as dusk falls or on entering a tunnel. Linking lamps to wiper operation genuinely is a legal requirement in some places, which makes the last option a real automatic function. The shared behaviour explains why these belong together and the differences explain why both exist. Tracing the requirement back to the physical constraint that produces it makes the answer follow.

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