A-6 Electrical ASE Test Preparation   


Red Kap Automotive Mechanics Clothing

Body Accessory Circuits - Diagnosis#1

 

1. Referring to the horn diagram below. Which of the following is least likely to cause all horns to be inoperative in a multiple-horn system?

improperly grounded horn.
defective horn relay.
blown fuse.
defective horn switch.

 

2. Referring to the horn diagram above in question #1. The horns do not work, using a voltmeter, pin #1 of the relay indicates 12 volts, pin #3 of the relay indicates 0 volts when the horn switch is pressed (closed). Locate the problem:

Point A.
Point B.
Point C.
Point D.
A blown fuse.

 

3. Referring to the horn diagram above in question #1. The horns do not work, using a voltmeter, pin #1 of the relay indicates 0 volts, pin #3 of the relay indicates 12 volts when the horn switch is pressed (closed). Locate the problem:

Point A..
Point B.
Point C.
Point D.
Defective horn switch.

 

4. Using the Blower Motor Circuit below answer the following. The Blower Fan Motor will not work correctly in the Medium-Hi (M2). When the switch is placed in M2 position the blower spins in low speed. All other fan speeds work correctly. The problem is an open at:

Point A.
Point B.
Point C.
Point D.
Point E.

 

5. Referring the Blower Fan Circuit in Question #4. The blower will not work in LOW. All other speeds function correctly. Locate the point of the problem:

Point A.
Point B.
Point C.
Point D.
Point E.

 

6. Referring the Blower Fan Circuit in Question #4. The blower will not work in HIGH SPEED. All other speeds function correctly. Locate the point of the problem:

Point A.
Point B.
Point C.
Point D.
Point E.

 

7. Two technicians are discussing the Blower Circuit in Question #4, Technician a says that if the ground is removed from the end of the blower resistor, that the high speed fan mode will not work. Technician b says that if the ground is removed from the end of the blower resistor, that only the high speed fan mode will work.

Technician A only.
Technician B only.
Both Technicians A and B.
Neither Technicians A nor B.

 

8. The clock display will not dim when the headlights are on. Locate the point of the problem:

Point A.
Point B.
Point C.
Point E.
Point F.

 

9. Referring to the digital clock diagram above in question #8. The digital clock looses it time setting every time the ignition switch is turned off. The problem is an open at:

Point A.
Point B.
Point C.
Point E.
Point F.

 

10. Referring to the digital clock diagram above in question #8. The digital clock looses it time setting every time the ignition switch is turned off. The problem is an open at:

Point A.
Point B.
Point C.
Point E.
Point F.

 

11. When testing each filament of a rear-window defogger grid with a voltmeter:

the voltmeter should read battery voltage anyplace along the grid line.
the voltmeter should decrease voltage as the grid is tested across the glass.
the voltmeter will indicate a pulsing 5 volt signal.
only an ammeter is used, a reading of 7 amps or higher is acceptable

 

12. Referring to the widow grid diagram above in question #11. A voltmeter shows 12.6 volts on both the right and left sides of defogger grid lines. This indicates:

normal readings.
a single grid has on open.
an open in the B+ side of the circuit.
an open ground connection.

 

 

Automotive Mechanics Work Clothing, Industrial Work Clothes  
© Autoshop 101, All rights reserved.  

 

workwear