Machine-translated by Google. Questions are authored in English.
Top

Discussion

Which corrosion problem affects rear lamp clusters particularly?

  • A.Bulb failure
  • B.Corrosion of the supply contacts, which prevents the lamps from illuminating at all once the fault has developed
  • C.Earth contact corrosion producing cross-connected lamps
  • D.Corrosion of the lens, which becomes opaque and therefore reduces the light emitted by the cluster considerably

Answer: C

A poor earth makes current seek a path through another filament, so the indicator lights the tail lamp dimly. Supply corrosion genuinely does prevent operation, which makes the last option a real if less puzzling fault. A symptom that appears under one condition and not another is what narrows the diagnosis quickly. Working the distinction through on a single concrete case fixes it more firmly than any rule of thumb. The shared behaviour explains why these belong together and the differences explain why both exist.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.