10 exam-style questions with answers and explanations, straight from our 1,030-question bank. Tap an answer to check yourself. When you're ready, take the scored version in the free practice test.
The A6 exam has 60 questions and runs 1 hour 30 minutes.
These 10 free A6 questions are organized by exam domain, so you can see how each part of the Automobile & Light Truck Certification - A6 Electrical/Electronic Systems blueprint is tested. Reveal the answer and explanation under each question.
An engine cranks slowly. A technician places an ohmmeter across the positive battery cable, reads 0.0 ohms, and concludes the cable is good. Why is this conclusion unreliable?
Correct answer: A - The ohmmeter's test current is far below the starter's draw
An additional lamp is connected in parallel with an existing lighting circuit. Compared with before, total circuit resistance and total current will:
Correct answer: B - Resistance decreases and current increases
All of these are correct practices when performing a key-off parasitic draw test EXCEPT:
Correct answer: C - Opening the circuit briefly to reconnect the meter between readings
With the headlights switched on, the reverse lamp on one side of the vehicle glows dimly. The MOST LIKELY cause is:
Correct answer: D - An open ground at the affected lamp assembly
A stored U-code is being diagnosed. Technician A says a U-code always means the module named in the code has failed. Technician B says an open in the bus wiring can set a U-code. Who is right?
Correct answer: B - B only
A battery measures 12.6 volts at rest. During a load test at approximately 70 degrees F, voltage falls to 8.8 volts. This result indicates the battery:
Correct answer: A - Has adequate charge but reduced capacity
An engine cranks slowly. Starter current draw measures well BELOW the manufacturer's specification. The MOST LIKELY cause is:
Correct answer: C - High resistance in the starter circuit
A new battery has been installed in a vehicle equipped with a battery monitoring sensor. Technician A says the replacement should be registered or reset to the charging strategy. Technician B says an AGM battery requires a different charging profile than a conventional flooded battery. Who is right?
Correct answer: C - Both A and B
While the engine is cranking, a voltage drop of 0.8 volts is measured between the starter solenoid's battery terminal and its motor terminal. This indicates:
Correct answer: D - Burned contacts within the solenoid
On a vehicle with regulated voltage control, charging voltage measures 13.1 volts at the battery. The scan tool shows a commanded charging voltage of 13.1 volts. This indicates:
Correct answer: C - The charging system is operating as commanded
The A6 exam also covers these domains. Drill them in the full free practice test:
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