Exam 13: Accessorieselectrical Accessories Diagnosis and Repair

The wipers operate properly in the manual mode, but not in the automatic mode. Technician A says the problem may be caused by a fault in the bus network. Technician B says the problem may be caused by a faulty rain sensor module. Who is correct?

False wipes in an automatic wiper system are usually the result of a foreign material on the windshield or from flaws in the windshield that interfere with the system optics.

Technician A says on an electromagnetic field wiper motor the strength of the total magnetic field will determine the motor speed. Technician B says on an electromagnetic field wiper motor the two field coils are wound in opposite directions so their magnetic fields will oppose each other. Who is correct?

Slower-than-normal wiper operation is being discussed. Technician A says this may be caused by excessive electrical resistance. Technician B says this may be caused by a problem in the mechanical linkage. Who is correct?

An electric window with a two-wire motor operates only in one direction. Which of the following could cause this problem?

The horn of a vehicle equipped with a horn relay is blowing very weakly; its sound level is continuous but low in volume. Technician A says the horn relay contacts may have excessive resistance. Technician B says the horn switch may have high resistance. Who is correct?

Intermittent wiper systems are being discussed. Technician A says they may use a solid-state module that may be incorporated into the body computer. Technician B says they may use a capacitor that operates the wiper motor directly until it is fully discharged. Who is correct?

A window regulator converts the rotary motion of the motor into the vertical movement of the window.

A high-side driver controlled heated seat grid system is being diagnosed. The connector from the control module is backprobed and a voltmeter connected to output circuit from the controller to the seat grid. When the system is activated, the voltmeter reads zero volts. Technician A says this system may deactivate the system if a fault is detected. Technician B says the control module is faulty. Who is correct?

What type of windshield wiper system allows the blades to drop down below the lower windshield molding to hide them?

Technician A says a horn that sounds constantly could be caused by a faulty relay. Technician B says a horn that sounds constantly could be caused by an open in the horn button switch. Who is correct?

The horn button on a relay-equipped horn system will apply a ground to the relay coil to activate the horn(s).

Describe the operation of the computer-controlled wiper system.

Describe the procedure used to determine if a windshield wiper problem is electrical or mechanical.

Blower motor system fan speed control is being discussed. Technician A says this is done by a resistor block wired in parallel to the fan. Technician B says this is done by use by a power module. Who is correct?

The power door lock system does not operate. Technician A says faulty unlock relay contacts could be the cause. Technician B says a faulty motor could cause this. Who is correct?

Which component within the wiper motor ensures that when the motor is turned off the wiper arms will be brought to the bottom position?

Describe the operation of the keyless entry system.

The antitheft system alarm periodically goes off without any apparent reason. Technician A says the problem could be caused by a faulty door ajar switch. Technician B says worn contacts inside the starter interrupt relay could be causing the problem. Who is correct?

Testing of an alarm system is being discussed. Technician A says that if the system fails to operate with the relay by-passed. The relay is defective. Technician B says the relay is generally tested with an ammeter. Who is correct?