ASE A6 Electrical Electronics Practice Test

Automotive electrical symbol

11. The electrical symbol illustrated above represents:

  • A. A heated element.
  • B. A splice.
  • C. A connector.
  • D. A motor.


Answer A is wrong. This is the symbol for a motor. Sometimes, it has an M in the circle.

Answer B is wrong. Diagrams use symbols to represent components in a circuit. This is the symbol for a motor.

Answer C is wrong. This is the symbol for a motor.

Answer D is correct. View the symbol chart in the Read More... section for more symbols used in automotive schematics.

12. An engine's cooling fan motor continues to blow the circuit's fuse. Which of the following is MOST likely causing this condition?

  • A. Excessive resistance in the circuit.
  • B. An open in the circuit.
  • C. An intermittent connection.
  • D. A short to ground.


Answer A is wrong. Unwanted resistance in a circuit results in restricted current flow.

Answer B is wrong. When there's an undesired open or break in a circuit, the component the circuit controls will not function. An open does not result in a blown fuse.

Answer C is wrong. An intermittent connection causes a device to work and then not work as the connection is interrupted.

Answer D is correct. A short in the circuit results in too much current flow and a blown circuit protection device (fuse). A fuse is a circuit protection device that melts and burns open to protect sensitive electrical circuits from excessive current.

13. A vehicle's cruise control system operates but disengages incorrectly. Which of the following components are used to disengage a cruise control system?

  • A. The brake switch.
  • B. The cruise control switch.
  • C. The resume switch.
  • D. Both A and B.


Answer A is wrong. The brake/cruise control switch deactivates the system. The brake pedal activated switch may not disengage the system, forcing the driver to use the switch on the column instead.

Answer B is wrong. The cruise control main switch contains the on/off switch to activate/deactivate the cruise control system.

Answer C is wrong. The resume function resumes the set speed after pressing the brake pedal, clutch pedal, or cancel button.

Answer D is correct. Today's cruise control systems have more than one way to deactivate the system.

14. An electric seat has no backward or forward movement. A humming sound is heard under the seat when pressing the backward/forward switch. The MOST likely cause of this condition is:

  • A. A short to ground in the motor's circuit.
  • B. Debris wedged into the seat rail.
  • C. An open circuit between the control module and the seat motor.
  • D. A loose connector from the seat harness to the seat motor.


Answer A is wrong. A short to ground will most likely blow the circuit's fuse and result in no operation.

Answer B is correct. If something like a napkin is wedged into the seat rail, there is little or no seat movement. It may also damage the motor. Visually inspect the seat rail for debris.

Answer C is wrong. An open circuit results in no motor operation.

Answer D is wrong. A loose connector results in intermittent or no operation. Sometimes the seat would move, other times it wouldn't.

15. Technician A says analog transmission range sensors use resistance to indicate gear selection. Technician B says analog transmission range sensors are tested for resistance with an ohmmeter. Who is correct?

  • A. Technician A
  • B. Technician B
  • C. Both A and B
  • D. Neither A or B


Answer A is wrong. Analog transmission range sensors use resistance to indicate gear selection to the TCM. Because it uses resistance, an ohmmeter can be used for diagnosis.

Answer B is wrong. Test a circuit's resistance with an ohmmeter. Never power a circuit while using an ohmmeter; this may damage the tester.

Answer C is correct. Both technicians are correct. The neutral safety switch and the transmission range sensor are protection devices used to prevent starter operation in all gears other than Park and Neutral.

Answer D is wrong. A misadjusted TR sensor can cause harsh shifting or confuse the PCM if its resistance is out of specification.