Practice question

A school bus diesel cranks slowly and a battery voltage drop test during cranking shows excessive voltage drop on the positive battery cable. This indicates:

  1. A healthy starting circuit
  2. A faulty SCR catalyst
  3. High resistance in the positive cable/connection that should be cleaned or repaired
  4. A worn brake rotor

Answer: C — High resistance in the positive cable/connection that should be cleaned or repaired

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Practice more: ASE S2 Diesel Engines (School Bus) Practice Questions - ASE S2 - Diesel Engines (School Bus) Certification Exam →