Automotive Electronics Practice Test

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Study for the Automotive Electronics Test. Prepare with engaging flashcards and detailed multiple-choice questions. Each question comes with hints and explanations. Ace your exam with ease!

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In fuse testing, what does it indicate if a test light lights up on only one side of the fuse?

  1. The fuse is okay

  2. The fuse is defective

  3. Both statements cannot be true

  4. Neither statement can be true

The correct answer is: The fuse is defective

When a test light lights up on only one side of the fuse, it indicates that there is continuity on that side, which means power is reaching the fuse. However, the absence of the test light illuminating on the other side indicates that the circuit is not complete. This typically means that the fuse has failed and is no longer allowing current to pass through, which is why the light does not illuminate on both sides. In a functional fuse, you would expect to see the test light lit on both sides, as the electric flow would be complete. Therefore, when the test light is only illuminated on one side, it confirms that the fuse is defective and needs to be replaced to restore functionality to the circuit.

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