HALDERMAN CHAPTER 18 – HORN, WIPER &
BLOWER MOTOR CIRCUITS 2026/2027 – STUDY
GUIDE & PRACTICE QUESTIONS
Play your way to mastery with fun games
Match Blocks Charms NEW
Terms in this set (21)
Technician A says that horn frequency Both
can range from 1,800 to 3,550 Hz.
Technician B says that most horn
circuits use a relay and the current
through the relay coil is controlled by
the horn switch. Who is right?
Which of these processes are used to Electromagnetism
operate automotive horns?
A) Electromagnetic Reduction
B) Magnetic Resonance
C) Magnetic Repulsion
D) Electromagnetism
, The rain sense module (RSM) can turn BCM (Body Control Module)
on the wipers by communicating with
the:
1) wiper motor
2) BCM
3) instrument cluster
4) PCM
A defective blower motor draws The CEMF decreases
more current than a good motor
because:
A) The speed of the motor increases
B) The CEMF decreases
C) The airflow slows down, which
decreases the cooling of the motor
D) Both A and C
Horn circuits are generally protected Fuse or fusible link
by a:
All of these could cause the wiper Poor ground connection at the wiper switch
motor to run but NOT move the
wipers, EXCEPT:
A) Poor ground connection at the
wiper switch
B) Loose or separated motor-to-
gearbox connection
C) Loose linkage to the motor
connection
D) Stripped gears in the gearbox
BLOWER MOTOR CIRCUITS 2026/2027 – STUDY
GUIDE & PRACTICE QUESTIONS
Play your way to mastery with fun games
Match Blocks Charms NEW
Terms in this set (21)
Technician A says that horn frequency Both
can range from 1,800 to 3,550 Hz.
Technician B says that most horn
circuits use a relay and the current
through the relay coil is controlled by
the horn switch. Who is right?
Which of these processes are used to Electromagnetism
operate automotive horns?
A) Electromagnetic Reduction
B) Magnetic Resonance
C) Magnetic Repulsion
D) Electromagnetism
, The rain sense module (RSM) can turn BCM (Body Control Module)
on the wipers by communicating with
the:
1) wiper motor
2) BCM
3) instrument cluster
4) PCM
A defective blower motor draws The CEMF decreases
more current than a good motor
because:
A) The speed of the motor increases
B) The CEMF decreases
C) The airflow slows down, which
decreases the cooling of the motor
D) Both A and C
Horn circuits are generally protected Fuse or fusible link
by a:
All of these could cause the wiper Poor ground connection at the wiper switch
motor to run but NOT move the
wipers, EXCEPT:
A) Poor ground connection at the
wiper switch
B) Loose or separated motor-to-
gearbox connection
C) Loose linkage to the motor
connection
D) Stripped gears in the gearbox
