Practice question

A school bus has amber warning lamps that work but the red lamps do not activate when the door opens. The most likely cause is:

  1. A faulty door switch or red-lamp relay
  2. A blown headlamp fuse
  3. A weak battery
  4. A bad alternator diode

Answer: A — A faulty door switch or red-lamp relay

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