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ASE Automobile & Light Truck (A1–A8) — Practice Exam

A6 Lighting: practice questions

Our ASE A1–A8 bank has 6 questions on this topic. Here are 5 of them with answers; the full mock exam draws from every topic, like the real one.

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Question 1 · A6 Electrical/Electronic Systems

Why must headlamps be aimed after replacing a headlamp assembly?

  1. To reset the BCM
  2. To avoid glare for other drivers and to light the road correctly
  3. It isn't necessary
  4. To make the bulbs last longer and keep the lenses from fogging
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B. To avoid glare for other drivers and to light the road correctly — Aim with the vehicle at curb weight and correct tire pressure.

Question 2 · A6 Electrical/Electronic Systems

What hazard do HID headlamps present during service?

  1. Very high voltage at the ballast and igniter
  2. Low voltage only
  3. Toxic fumes from the xenon gas when a bulb breaks
  4. No hazard
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A. Very high voltage at the ballast and igniter — Follow the maker's safety procedures.

Question 3 · A6 Electrical/Electronic Systems

One headlamp is dim while the other is bright. What is a likely cause?

  1. A weak battery
  2. High resistance in the dim lamp's ground or feed
  3. A bad alternator
  4. A blown fuse that feeds both of the headlamps
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B. High resistance in the dim lamp's ground or feed — A voltage drop test on that circuit will confirm it.

Question 4 · A6 Electrical/Electronic Systems

A turn signal flashes rapidly on one side. What is the usual cause?

  1. A faulty flasher unit affecting both sides of the vehicle
  2. A weak battery
  3. A burned-out bulb or poor connection on that side
  4. A bad hazard switch
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C. A burned-out bulb or poor connection on that side — Less current through the flasher speeds it up on many systems.

Question 5 · A6 Electrical/Electronic Systems

Brake lights work but turn signals don't on the same rear lamp. Which part is shared and could be at fault?

  1. The turn signal switch or the combined circuit through it
  2. The headlight switch
  3. The fuel pump relay
  4. The brake light switch at the pedal and its connector
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A. The turn signal switch or the combined circuit through it — On many vehicles the brake signal passes through the turn switch.

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