Practice question

A school bus turn signal works but does not self-cancel after a turn. The most likely cause is:

  1. A discharged battery
  2. A bad alternator diode
  3. A faulty turn signal canceling cam or switch mechanism
  4. A blown dome lamp fuse

Answer: C — A faulty turn signal canceling cam or switch mechanism

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