Exam 11: Lighting Circuitslighting Circuits Repair and Diagnosis

Technician A says when a fiber optic indicator is not operating, the cause could be a bend in the cable. Technician B says the cause could be the light source not operating. Who is correct?

Automatic leveling headlamps uses a ____ that adjusts the headlamp reflector up or down for proper headlamp aiming.

List and explain the causes of dimmer than normal lights.

Technician A says solid-state circuitry is used in headlight dimming systems to control beam switching. Technician B says headlight dimming systems can use mechanical relays to control beam switching. Who is correct?

A lamp outage module can monitor the operation of which lighting system?

Technician A says that most active headlight systems will set DTCs if a fault is detected. Technician B says if scan tool activation tests of the active headlight system fails to initiate motor movement, the fault is with an input sensor. Who is correct?

How does a headlamp lens redirect the light beam and create a broad, flat beam?

Headlight leveling systems usually change the height of the projected beam by moving what component of the headlight assembly?

Explain the operation of the basic automatic headlight dimming system.

What forward facing input device does the SmartBeam system use?

Illuminated entry systems turn on the ____ lights before the doors are opened.

The "bulb failure" warning light of a vehicle is illuminated whenever the headlights are turned on. Technician A says this can be caused by an excessive voltage drop on the ground circuit of one of the park lights. Technician B says an incorrect bulb may be installed. Who is correct?

On some center high mounted stop light (CHMSL) systems what is the purpose of the diodes?

Technician A says the headlight switch may be at fault when none of the external parking and headlights turn on. Technician B says it may be caused by a faulty circuit from the battery to the switch. Who is correct?

Technician A says headlight aiming of composite headlights may be based on measuring the beam position on a wall or screen. Technician B says an optical headlight aiming system may need to be used. Who is correct?

Condensation in the housing of a composite headlight system will cause the bulb to burn out.

Technician A says that the automatic headlight system may use a forward facing digital imager camera. Technician B says most adaptive (active) headlight systems require may require initialization or calibration after service. Who is correct?

No matter the type of control used, the headlight system typically ____________ to prevent total headlight system failure if one filament burns out.

In the SmartBeam system, the headlight intensity is based on which of the following:

Describe the operation of a typical computer-controlled headlight system.