Deck 14: Accessories Electrical Accessories Diagnosis and Repair

Question 1

All of the following can cause the horn to sound continuously EXCEPT:

A) Circuit between relay and horn shorted to power.
B)Short to ground between relay and horn.
C)Horn switch contacts stuck closed.
D) Short to ground between the relay coil and the horn switch.

Answer 1

B

Question 2

When diagnosing a memory seat system, you find that the driver's seat does not move at all. The first procedure you should perform is:

A)To check the system for codes.
B)A visual inspection.
C)To check for voltage to the motor.
D)To replace the defective seat motor.

Answer 2

B

Question 3

What is the LEAST likely cause of slow windshield wiper operation?

A) Binding mechanical linkage.
B)Excessive resistance in the motor's ground circuit.
C)Short to power at the low-speed brush.
D) Worn common brush.

Answer 3

C

Question 4

A sunroof is opening slower than normal and appears to be "jerky" in its operation. The most likely cause of this problem is:

A) A shorted armature or field coil in the sunroof motor.
B)A stuck open limit switch.
C)A stuck closed limit switch.
D) A stuck OPEN switch.

Question 5

Which statement about permanent magnet wiper motors is true?

A) The more armature windings between the high-speed and common brushes results in less magnetism in the armature and lower CEMF.
B)The lower the CEMF in the armature, the greater the armature current.
C) The fewer windings between the low-speed and common brushes results in increased magnetism and higher CEMF.
D) All of these choices.

Question 6

An electric window with a two wire motor operates only in one direction. Which of the following could cause this problem?

A)Faulty window switch
B)Faulty window motor
C)Faulty system circuit breaker
D) All of these choices

Question 7

The power seats do not move fore or aft. The technician notices that the motor attempts to move the seat then stops. The least likely cause of this is:

A)A binding track
B)A short in the motor armature
C)A faulty PTC
D) An obstruction under the seat

Question 8

Horn relays are sometimes included in the horn circuit for which of the following reasons?

A)To allow the use of two horns in the circuit.
B)To decrease the amount of current needed by the horns.
C)To decrease the amount of current that flows through the horn switch.
D) To allow the horn button to be placed on the end of a stalk on the steering column.

Question 9

What do the two-speed wiper motors generally use to achieve the two speeds?

A)Cams
B)Reduction gears
C)Speed-control brushes
D)A combination of all of the above

Question 10

Sound from the horn is generated by:

A) Heat causing the diaphragm to vibrate.
B)Vibrating a column of air.
C)Pulse-width modulating of the horn relay.
D) All of these choices.

Question 11

How do depressed-park windshield wiper systems generally park the blades?

A)By turning off B+ to the motor
B)By applying B+ to the motor
C)By ungrounding the switch
D) By reversing the motor direction

Question 12

Which component within the wiper motor ensures that when the motor is turned off the wiper arms will be brought to the bottom position?

A)Wiper switch
B)Park contacts
C)Recycle relay
D) None of these choices