ASE A6 Electrical Electronics Practice Test
46. All the lights in a brake light circuit illuminate except one. The MOST likely cause is:
- A. An open wire.
- B. An open taillight switch.
- C. A blown fuse.
- D. A burned bulb.
47. The number 2 and 3 cylinders of a four cylinder engine are producing less secondary voltage than the 1 and 4 cylinders. According to the diagram above which of the following is causing this condition?
- A. There is an open at point A of the ignition system.
- B. There is an open at point C of the ignition system.
- C. There is resistance at point C of the ignition system.
- D. There is resistance at point D of the ignition system.
Answer A is wrong. This ground is for both drivers.
Answer B is wrong. An open at point C results in no voltage output and a misfire code with both the 2 and 3 cylinders.
Answer C is correct. Resistance at point C in the 2-3 coil’s power circuit will result in low output at the 2-3 coil only. This is because reduced primary voltage caused by electrical resistance results in low secondary voltage output. Perform a primary circuit voltage drop test to confirm.
Answer D is wrong. Resistance in the crankshaft position sensor’s circuit will result in a corrupt signal and a probable no-spark condition at both coils.
48. If a technician reversed the leads of a digital voltmeter on a 12 volt circuit the readout would show:
- A. 0.00 volts
- B. -0.00 volts
- C. 12.00 volts
- D. -12.00 volts
Answer A is wrong. Because the leads are crossed the output is -12.00 volts.
Answer B is wrong. The answer is -12.00 volts.
Answer C is wrong. The answer is -12.00 volts.
Answer D is correct. The answer is -12.00 volts. If the leads are reversed using a digital meter, the polarity is changed resulting in a negative voltage reading.
49. The hazard and turn signal lights are inoperative. Technician A says that they share the same circuit. Technician B says the vehicle may have a faulty flasher. Who is correct?
- A. Technician A
- B. Technician B
- C. Both A and B
- D. Neither A or B
50. All of the following are true about battery replacement EXCEPT.
- A. Use a computer memory saver.
- B. Remove the negative terminal first.
- C. Replace the positive terminal last.
- D. Use a battery terminal puller if the terminal is stuck to the post.
Answer A is wrong. Using a memory saver is a great way to retain the memory in computer modules.
Answer B is wrong. Remove the negative terminal first.
Answer C is correct. Replace the negative terminal last.
Answer D is wrong. If the terminal is stuck to the post, don’t pry at it and possibly damage the case, use a battery terminal puller instead.