Question 1

The horn relay is controlled by the horn button and/or the BCM.

Accepted Answer

The horn relay is typically controlled by the horn button on the steering wheel and can also be controlled by the Body Control Module (BCM) in modern vehicles, which manages various electronic components in the car.

Question 2

A bidirectional scan tool allows the technician to run the wiper motor forward and backwards.

Accepted Answer

False&#10;

Question 3

Most horns are grounded through a fusible link.

Accepted Answer

Most horns are grounded through their mounting to the vehicle's frame or body, which acts as the ground path, not through a fusible link. A fusible link is a type of electrical fuse used to protect wiring from overheating and catching fire, not typically for grounding components.

Question 4

Refer to the wiring schematic. A burned open R2 in the blower resistor pack would have what effect on the blower operation?  &#10;A)Blower relay will not function&#10;B)Blower does not operate at all&#10;C)Blower only runs in Hi&#10;D)Blower operates in Hi and Med Hi only

Accepted Answer

The answer of Refer to the wiring schematic. A burned...

Question 5

The rain sense module (RSM) can turn on the wipers by communicating with ________.&#10;A)The PCM&#10;B)The wiper motor&#10;C)The instrument cluster&#10;D)The BCM

Accepted Answer

The rain sense module (RSM) can turn on the wipers by communicating with the Body Control Module (BCM). The BCM is responsible for controlling various body-related functions in a vehicle, including the operation of the windshield wipers.

Question 6

The electronics in the rain-sense wiper module can detect the presence of rain drops under various lighting conditions. Which of these solid state components is used to sense rain drops?&#10;A)Infrared light sensor&#10;B)Photo Diode&#10;C)Laser LED&#10;D)Any of these

Accepted Answer

The electronics in a rain-sense wiper module can use various types of solid state components to detect rain drops, including infrared light sensors, photo diodes, and laser LEDs. Each of these components can be utilized to sense changes in light patterns caused by rain drops, making "Any of these" the correct answer.

Question 7

A typical blower motor draws about ________ amperes on high speed.&#10;A)12 to 15&#10;B)3&#10;C)7 to 8&#10;D)5

Accepted Answer

A typical blower motor draws about 12 to 15 amperes on high speed, which is consistent with the power requirements for moving a significant volume of air in HVAC systems or vehicles.

Question 8

Which of these should never be used as windshield washer fluid?&#10;A)20 % Washer fluid and 80% water mixture&#10;B)50 % Washer fluid and 50% water mixture&#10;C)Pure water&#10;D)Ethylene Glycol

Accepted Answer

Ethylene Glycol, commonly used as automotive antifreeze, should never be used as windshield washer fluid due to its toxic properties and potential to damage vehicle parts and paint.

Question 9

All of these could cause the wiper motor to run but NOT move the wipers, EXCEPT ________.&#10;A)Loose or separated motor-to-gearbox connection&#10;B)Poor ground connection at the wiper switch&#10;C)Loose linkage to the motor connection&#10;D)Stripped gears in the gearbox

Accepted Answer

A poor ground connection at the wiper switch would likely prevent the wiper motor from running at all, rather than causing the motor to run without moving the wipers. The other options directly affect the mechanical connection between the motor and the wipers, which can cause the motor to run without moving the wipers.

Question 10

Two-speed wiper motors generally use ________ to achieve the two speeds.&#10;A)Reduction gear transmission&#10;B)Cams&#10;C)Gear reduction&#10;D)Speed control brushes

Accepted Answer

Two-speed wiper motors typically use speed control brushes to achieve different speeds by altering the electrical path and resistance within the motor.

Question 11

Horn circuits are generally protected by a ________.&#10;A)Fuse&#10;B)Breaker bar&#10;C)Either A or B&#10;D)Neither A nor B

Accepted Answer

The answer of Horn circuits are generally protected by a...

Question 12

Technician A says that most horn circuits use a relay and the current through the relay coil is controlled by the horn switch or body control module. Technician B says that most windshield wipers use a two-brush, three-speed motor. Who is right?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Accepted Answer

The answer of Technician A says that most horn circuits...

Deck 58: Horn, Wiper, and Blower Motor Circuits