WorksheetsAUTO1405 Power Mirror & Defrost
Total questions: 15
Worksheet time: 8mins
Heated windshields are possible through the use of heat grid technology.
True
False
Rear defrost is standard on all vehicles.
true
false
In order to operate correctly, a defrost heat grid must be supplied 12volts through a simple series circuit.
True
False
Select the most correct statement regarding heated mirrors.
The heat feature of the mirrors is supplied 5volt reference and monitored for temperature
Heated mirror operate in series with the rear defrost
Heated mirrors are often controlled by the same switch as rear defrost
Heated mirrors are standard on most vehicles
Memory mirror positions are possible through the use of which of the following?
Contact switch
DDM/PDM
Switch
PCM
What best describes the operation of a wiper park position heater?
Operates under the same principles as a rear defrost
Requires the HVAC system and use of A/C compressor
Comes standard on all North American vehicles released after 2020.
Conductive wiper arms are supplied 12volts to produce heating effect
Telescoping mirror operation requires how many motors per mirror?
2
1
3
5
Tech A says that the direction of a DC motor can be altered by reversing circuit polarity. Tech B says that a power adjustable mirror has one "motor assembly", equipped with two internal DC motors. Who is correct?
Tech A
Tech B
Both Tech A and B
Neither Tech A or B
Heated front windshields use the technology of a micro-thin metallic coating inside the windshield.
TRUE
FALSE
Rear defrost is monitored for temperature and turned off prior to glowing red hot.
True- This prevents damage to the glass and grid lines
True - This is a safety feature to prevent unintended thermal events
False- The system is activated on a timer, commonly 10mins, and turns off after that time.
False- The system is active until the operator turns off the defrost by the switch
Select all of the tools that are best suited for diagnosing rear defrost system for a fault.
12v incandescent test light
12-24v LED test light
Digital Volt Meter
Thermal Imager
When a rear defrost grid is damaged, repairs are not possible and it is mandatory to replace the rear glass of the vehicle.
True
False
Which term best describes mirrors that can be extended and retracted from the press of a button?
Power Adjustable
Power Folding
Power Telescoping
What is the reason that "Objects in mirror are closer than they appear"?
Concave mirror glass
Convex Mirror Glass
Small image in the mirror can be deceiving
The vehicles in mirror are approaching and there is a delay from the reflection
Blindspot detection systems warn the driver of objects present in areas not seen by the mirror reflection.
True
False
