Exam 11: Lighting Circuitslighting Circuits Repair and Diagnosis

Before the headlights are aimed, the vehicle must be checked for proper ____.

Daylight running lamp systems are being discussed. Technician A says the reduced intensity of the headlamps can be accomplished by increasing the duty-cycle of the power feed circuit. Technician B says that on some systems, the brightness of the lamps will increase as night approaches. Who is correct?

Explain how the filament type lamp produces light.

What is the purpose of the adaptive (active) headlight system?

Brighter-than-normal lights can be the result of ________________ or improper lamp application.

Explain the function of the illuminated entry system.

When today's technician performs repairs on the lighting systems, the repairs must meet at least what two requirements?

Describe the operation of the lamp outage module.

What inputs are used for the automatic headlight leveling system?

The photocell uses light to change resistance.

____ occurs when electricity seeks a path of lower resistance and operates another component than the one intended.

As ambient light levels increase what will happen to the photocells resistance?

To test the photo cell, use a scan tool or a DMM to measure the ____ of the photo cell signal circuit to the BCM.

Which of the following is NOT used to control the brightness of the instrument panel lamps?

Technician A says the lamp outage module is a current measuring diode. Technician B says a lamp outage module may contain a set of resistors wired in parallel. Who is correct?

The courtesy lights do not turn on when the driver's door is open but illuminate when the FOB is used to unlock the doors. What is the MOST likely cause?

Which of the following lamp designs have the fastest activation time?

Technician A says if the ignition switch is placed in the RUN position before the timer circuit turns off the interior lights, the timer sequence is shut off and the interior lights turn off. Technician B says a switch in the handle will close the ground path from the actuator when either of the front door handles is lifted. Who is correct?

Fiber optics are used in areas where bulbs would be inaccessible for service.

On some turn signal systems a ____ is used to open and close the turn signal circuit at a set rate.