2023 Edition

ASE A6 Practice Test

ASE identifies electrical systems as an individual service area. The electrical systems service area involves the components and systems listed below.

  • Battery a device that stores and provides electrical power for the vehicle.
  • Charging system -Electrical components that create electrical power for the vehicle.
  • Starter motor and starter circuit -Components that cranks the engine.
  • Lighting system -Group of lights that help the driver to see at night (head lights) and that provide convenience (such as a dome light).
  • Gauges and accessories -Group of electrical components that provide the driver with information and convenience (the gas gauge, brake warning light, and radio, for example).

Tests.com's ASE A6 Practice Test was written by Dr. John Kershaw, an ASE test prep expert: ASE test question developer; ASE Certified Master Technician; ASE Master Truck Technician; and Auto Industry Technical Instructor.  Dr. Kershaw was among the first to receive ASE certification in 1972. 

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General Electrical/Electronic System Diagnosis

1. When using a DMM (Digital Multimeter) voltmeter function to check for a voltage drop, meter leads should be connected in which of the following ways?
2. Which of the following is correct regarding a series circuit?
3. When a Digital Multimeter (DMM) is used to measure DC voltage and is connected in parallel to the load device, which of the following defines the reading?
4. Which of the following tools can be used to check the continuity of wires that carry digital signals?

Battery and Starting System Diagnosis and Repair

5. Using a DMM (Digital Multimeter), a fully charged 12 volt battery should indicate how much voltage on the open circuit voltage (OCV) test?
6. Two technicians are discussing a battery's state of charge. Technician A says a specific gravity of 1.225 at 80F indicates that a battery's state of charge is approximately 75%. Technician B says you can use a hydrometer to check battery state of charge on a maintenance free battery. Who is right?
7. When performing a load test on a battery, a technician finds that the battery voltage drops below specifications. Which of the following is the MOST likely action to perform?
8. Two technicians are discussing testing a battery using an electronic conductance or continuity tester. Technician A says some of these testers can load test a battery. Technician B says you need to make sure that the ignition switch and all accessories are off. Who is right?

Charging System Diagnosis and Repair

9. Two technicians are discussing an alternator with zero output. Technician A says the field circuit may have an open circuit. Technician B says the fusible link may be open from the battery to the alternator. Who is right?
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10. This question is not like the ones above. It has the word LEAST. For this question, look for the choice that would LEAST LIKELY cause the described situation. Read the entire question carefully before choosing your answer. An alternator has low output and is being full-fielded to determine the cause. Which of the following is the LEAST likely result of full-fielding the alternator?
11. Technician A says a loose serpentine alternator drive belt could cause overcharging. Technician B says undersized wiring between the alternator and the battery could cause undercharging. Who is right?
12. The figure on the right shows a belt tensioner with four lines to indicate belt wear and the need for replacement. Technician A says upon installation of a new belt, the three line marks close to each other should be very close to the ARROW on the base. Technician B says the belt should be replaced if the single line mark lines up with the ARROW on the base. Who is right?

Lighting Systems Diagnosis and Repair

13. Technician A says high-intensity discharge (HID) headlights are generally brighter and have a blue tint. Technician B says a defective turn signal bulb on one side can cause the turn signal on that side not to blink. Who is right?
14. Which of the following is the LEAST likely cause of a dim headlight?
15. Technician A says you aim HID (High Intensity Discharge) headlights on a level floor with an unloaded vehicle. Technician B says when aiming any headlights, you must follow the state inspection specifications. Who is right?
16. Technician A says an aiming screen will work on any headlight design to aim the headlights. Technician B says mechanical aimers are used on HID (High Intensity Discharge) headlights. Who is right?

Instrument Cluster & Driver Information Systems Diagnosis & Repair

17. Which of the following describes the MOST common type of electrical wiring used in instrument lighting?
18. What type of solder is required to repair the instrument panel wiring?
19. A dash indicator warning lamp does not light when the key is in the ON or START positions. What should you check first?
20. If a fuel gauge reads full, which of the following is the MOST likely cause?

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Our practice exam writer
Written by:
Dr. John Kershaw
ASE Test Prep Expert

ASE Test Question Developer

ASE Certified Master Technician

ASE Master Truck Technician

Auto Industry Technical Instructor

Among first ASE Certified in 1972
Actual ASE A6 Topics

• General Electric/Electronic 
• Battery and Starting Systems
• Charging Systems
• Lighting Systems
• Instrument Cluster/ Driver Info.
• Body Electrical Systems 


Number of Questions on the Actual ASE A Series Tests

A1 – Engine Repair (60)
A2 – Automatic Transmission/Transaxle (60)
A3 – Manual Drive Train & Axles (50)
A4 – Suspension & Steering (50)
A5 – Brakes (55)
A6 – Electrical/Electronic Systems (60)
A7 – Heating & Air Conditioning (60)
A8 – Engine Performance (60)
A9 – Light Vehicle Diesel Engines (60)