Practice question

A school bus charging system shows correct voltage but the technician suspects diode failure. The best test is to:

  1. Perform a cranking voltage test
  2. Measure AC ripple voltage at the battery with engine running
  3. Check specific gravity
  4. Test the neutral safety switch

Answer: B — Measure AC ripple voltage at the battery with engine running

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Practice more: ASE S6 Electrical Electronic Systems (School Bus) Practice Questions - ASE S6 - Electrical Electronic Systems (School Bus) Certification Exam →