AT 121 - Ch2 - Lab 2 - Meter Usage and Setup



AT 121 – Chapters 8, 10, and 11 – Spring 2011

Name: ____________________________________

Date: ____________________________________

(Using the Schematics from Mitchell’s On Demand, print out and include with your test. You may draw or mark them to help find the answers to the questions below. MARK ALL FINAL ANSWERS ON THE ANSWER KEY! YOU MAY WRITE ON THIS TEST!

1998 Dodge Dakota R/T Base Radio W/O Amplifier

1. How Many Speakers Are in This Audio System? __________________________

2. What are the fuse numbers and ratings for the audio system?

_________________________________ _________________________________

_________________________________ _________________________________

_________________________________ _________________________________

3. What is the ground number(s), and location(s)? ______________________________________________

4. How many wires run to/from the radio (total, meaning ALL the wires..)? __________________________

5. What pin number(s)/color(s) is/are ground for the radio? ___________________________________

6. At what point will Pin 4 (BLK/YEL) on Connector C1 have power?

A. When the headlamps are on

B. When the parking lights are on

C. At all times

D. A and B

7. What is the wire color and pin number on the radio is hot at all times?

A. Pin 6 – Connector C1 – RED/WHT

B. Pin 7 – Connector C1 – PNK

C. Pin 4 – Connector C1 – BLK/YEL

D. Pin 5 – Connector C1 – ORG

8. What is the wire color and pin number on the radio only has power when the car is “on”?

A. Pin 6 – Connector C1 – RED/WHT

B. Pin 7 – Connector C1 – PNK

C. Pin 4 – Connector C1 – BLK/YEL

D. Pin 5 – Connector C1 – ORG

9. What fuse would blow if the joint connector, Pin 1 – had a short to ground?

A. Fuse 12 15A

B. Fuse 14 10A

C. Fuse 12 10A

D. Fuse 5 5A

10. If there were an open on Pin 2 (Connector C1) off the radio, which speaker would be affected?

A. LF Speaker (Door)

B. RF Speaker (Door)

C. RR Speaker

D. LR Speaker

11. If the left rear speaker did not function, what wire colors/pin numbers would you check?

A. C1 – Pin 2 – BRN/RED and C2 – Pin 4 DK GRN

B. C2 – Pin 6 – BRN/LT BLU and C2 – Pin 2 BRN/YEL

C. C2 – Pin 4 – DK GRN and C1 – Pin 3 DK BLU/RED

D. None of the above

12. If pin 4 at C1 had a short to ground, what fuse would blow?

A. Fuse 14 15A

B. Fuse 14 10A

C. Fuse 12 10A

D. Fuse 8 10A

13. If there were a short to ground at G201, what would happen?

A. Fuse 14 would blow

B. Nothing, it’s a ground

C. Fuse 5 would blow

D. Fuse 12 would blow

14. When does fuse 5 have power?

A. When the radio is on

B. When the headlamps are on

C. It’s the backup fuse for Fuse 14

D. It never has power; it’s a spare fuse for the dimmer circuit.

2000 VW Jetta GLS- Horn Circuit

15. How Many Horns Are in This System? __________________________

16. What are the fuse numbers, and ratings for the horns? _______________________

17. How many wires run each horn? __________________________

18. Where is the horn relay located? ______________________________

19. There is a short to ground at the RED/BRN (Connector S1/4) wire at the relay, what will happen?

A. Fuse 40 will blow

B. The horns will be stuck on at all times

C. The relay will blow out

D. None of the above

20. There is a short to ground on the BLK/YEL wire at the right horn. What will happen?

A. Fuse 40 will blow

B. The horns will be stuck on at all times

C. The relay will blow out

D. None of the above

21. If G100 were open, or had a poor connection, what component would not function?

A. Left Horn

B. Right Horn

C. Both Horns

D. Horn Switch

22. If G202 were open, or had a poor connection, what component would not function?

A. Left Horn

B. Right Horn

C. Both Horns

D. Horn Switch

23. There is a short to ground on the BRN/BLU (Connector S1/ 6) wire at the relay. What will happen?

A. Fuse 40 will blow

B. The horns will be on at all times

C. The relay will blow out

D. None of the above

CUSTOMER COMPLAINT - The Vehicles Horn Does not Operate

Test the fuses based on the schematic.

Use only a test lamp.

24 -26. Fuse Number(s)/Ratings tested :______________________________________

27-28 . What did you find?

A. Wrong size fuse and a blown fuse.

B. Correct Fuse, but fuse is blown.

C. Wrong size fuse, but NOT blown.

D. No problem found - fuses OK.

29. What would be the voltage drop across the motor if the switch were open? ________

A. 12 volts

B. 6 Volts

C. 0 Volts

D. 1 amp

30. Would be the voltage drop across the fuse if the switch were closed? ________

A. 12 volts

B. 6 Volts

C. 0 Volts

D. 1 amp

32. Would be the voltage drop across the switch if the switch were closed? ________

A. 12 volts

B. 6 Volts

C. 0 Volts

D. 1 amp

33. Would be the voltage drop across the motor if the switch were closed? ________

A. 12 volts

B. 6 Volts

C. 0 Volts

D. 1 amp

34. This is a…

A. Power side switch, series circuit.

B. Ground side switch, series circuit.

C. Power side switch, parallel circuit.

D. None of the above.

35. This picture shows:

A. Measuring Resistance

B. Measuring Voltage Drop

C. Measuring Current

D. None Of The Above

36. This picture shows:

A. Measuring Resistance

B. Measuring Voltage Drop

C. Measuring Current

D. None Of The Above

37. This picture shows:

A. Measuring Resistance

B. Measuring Voltage Drop

C. Measuring Current

D. None Of The Above

38. This picture shows:

A. Measuring Resistance

B. Measuring Voltage Drop

C. Measuring Current

D. None Of The Above

|39)  |When testing an ISO (International Standards Organization) relay using an ohmmeter, which two terminals should | |

| |be touched to measure the coil resistance? | |

|  |A)  86 and 85 |

|  |B)  86 and 87 |

|  |C)  87 and 30 |

|  |D)  87a and 87 |

|40)  |Which ISO (International Standards Organization) relay terminal is the normally closed (N.C.) terminal? |

|  |A)  30 |

|  |B)  87a |

|  |C)  87 |

|  |D)  85a |

|41)  |The higher the American wire gauge (AWG) number, which of these happens? | |

|  |A)  Smaller the wire |

|  |B)  More strands per foot |

|  |C)  Thicker the insulation |

|  |D)  Larger the wire |

|42)  |Technician A says a good relay should measure between 60 and 100 ohms across the coil terminals. Technician B | |

| |says the letters "OL" (over limit) should be displayed on an ohmmeter when touching terminals 30 and 87. Who is| |

| |right? | |

|  |A)  A only |

|  |B)  B only |

|  |C)  Both A and B |

|  |D)  Neither A nor B |

|43)  |What type of solder is required used for electrical work? | |

|  |A)  Acid core |

|  |B)  60/40 with no flux |

|  |C)  50/50 with acid paste flux |

|  |D)  Rosin core |

| | |

| | |

| | |

|44)  |Inductive ammeters work because of what principle? | |

|  |A)  Magnetic field surrounds any wire carrying a current |

|  |B)  Electrostatic electricity |

|  |C)  Voltage drop as it surrounds a resistor |

|  |D)  Electromagnetic resistance |

| | |

| | |

|45)  |Kilo (k) means which of these? | |

|  |A)  100 |

|  |B)  1 |

|  |C)  1000 |

|  |D)  10 |

|46)  |Which of these meter types is used to measure amperes? | |

|  |A)  Ammeter |

|  |B)  Coulomb meter |

|  |C)  Nanometer |

|  |D)  Amp meter |

|47)  |Read the entire question carefully before choosing your answer. |

| |The letters OL on read out of most Digital Multimeters (DMM), can mean all of these, EXCEPT |

|  |A)  Overload |

|  |B)  Over limit |

|  |C)  Over linear range |

|  |D)  Out of Limits |

|48)  |A DMM (Digital Multimeter) is set on the millivolt scale and meter face displays 632. The reading means how | |

| |many volts? | |

|  |A)  0.632 |

|  |B)  63.2 |

|  |C)  6.32 |

|  |D)  6,320 |

|49)  |What could happen if the meter leads were connected to the positive and negative terminals of the battery while| |

| |the meter and leads were set to read amperes? | |

|  |A)  Display OL symbol |

|  |B)  Display no reading |

|  |C)  Blow the internal fuse |

|  |D)  Read volts instead of amperes |

|50)  |If a digital meter face shows 0.73 when set to read kΩ, the reading means which of these ohm values? | |

|  |A)  73,000 |

|  |B)  7300 |

|  |C)  73 |

|  |D)  730 |

ANSWER KEY - AT 121 - SPRING 2011 - UNIT TEST 2.

NAME :________________________ DATE: ________________________________

ALL ANSWERS MUST BE SHOWN ON THIS SHEET!

|SECTION 1- |24- 26 - |

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