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Which advantage does the millivolt drop method have?

  • A.It identifies the component rather than the circuit, which removes the need for any further investigation afterwards
  • B.The circuit is not opened so modules do not wake
  • C.It measures the current more accurately, which is required because the drain is very small in a modern vehicle
  • D.It is faster only

Answer: B

Pulling a fuse can wake a module and restart the timer, so measuring the drop across an intact fuse avoids that entirely. Accuracy is actually poorer than a direct ammeter reading, which makes the second option an inversion of the truth. Most errors here come from carrying across a result from a neighbouring case where it does not hold. Tracing the requirement back to the physical constraint that produces it makes the answer follow. A single measurement chosen to respond to the one asymmetry beats several that respond to shared behaviour.

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