Practice question

A school bus backup (reverse) lamp stays illuminated even when the transmission is in a forward gear. The most likely cause is:

  1. A burned-out backup bulb
  2. An open backup lamp ground
  3. A blown clearance lamp fuse
  4. A stuck-closed backup lamp switch or wiring shorted to power

Answer: D — A stuck-closed backup lamp switch or wiring shorted to power

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