Lighting Systems/Instrument Cluster D & R

​A halogen headlight bulb must be replaced. Technician A says these bulbs are generally held in place with a retaining ring secured with small screws. Technician B says you should never touch the glass surface of the bulb. Who is right?

1. A only

2. B only

3. Both A and B

4. Neither A nor B

​1. (B) B only 2. (C) Both A and B 3. (C) Both A and B 4. (C) Both A and B 5. (D) All of the above. 6. (D) Neither A nor B 7. (D) flasher unit. 8. (A) panel lights dimmed. 9. (B) series of lines on the shop wall. 10. (C) Both A and B

​Headlight systems are being discussed. Technician A says that most late-model cars use halogen headlight bulb inserts. Technician B says HID bulbs produce more light than standard halogen bulbs while consuming less energy. Who is right?

1. A only

2. B only

3. Both A and B

4. Neither A nor B

​Light bulbs are being discussed. Technician A says that LEDs draw a small amount of electrical energy. Technician B says that LEDs are often used in dashboards because of the long service life and small packaging. Who is right?

1. A only

2. B only

3. Both A and B

4. Neither A nor B

​The headlight dimmer switch is being discussed. Technician A says that when the driver activates the dimmer switch, the connection to the headlights is changed. Technician B says that the dimmer switch is often part of a multifunction switch. Who is right?

1. A only

2. B only

3. Both A and B

4. Neither A nor B

​Which of the following is often used by automatic headlight dimmers to control high and low headlight beams?

1. Relay

2. ECM

3. Light sensor

4. All of the above.

​Daylight running lights (DLRs) are being discussed. Technician A says that DLRs can be used in place of headlights. Technician B says that the taillights are also illuminated when the DLRs are used. Who is right?

1. A only

2. B only

3. Both A and B

4. Neither A nor B

​Each of the following is part of the brake light system EXCEPT:

1. brake light switch.

2. fuse.

3. rear taillights.

4. flasher unit.

​Each of these conditions should exist during a headlight aiming test EXCEPT:

1. panel lights dimmed.

2. tires inflated correctly.

3. car has half a tank of gas.

4. spare tire and jack in trunk.

​A headlight aiming screen is a:

1. veil covering headlights.

2. series of lines on the shop wall.

3. transparent paper partition.

4. None of the above.

​Horn system problems are being discussed. Technician A says that if a horn blows continuously, the horn switch may be bad. Technician B says that horn problems may be caused by burned contacts in the relay. Who is right?

1. A only

2. B only

3. Both A and B

4. Neither A nor B