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How do I test my rear window defogger?
You can test this with the defroster test lamp or an automotive circuit tester. Make sure the rear defroster switch and the ignition key are turned on. Disconnect both wires from either side of the defroster grid and touch one end of your tester to each wire. If the light comes on, you have power.
Why does my rear window defroster not work?
Reasons your rear defroster doesn’t work. While front defroster problems are often caused by issues with the cooling or HVAC systems, a problem with your rear defroster can usually be traced to a faulty electrical component. This could be: The rear defroster fuse, switch, relay and wiring.
The front defroster has vents on the dashboard that face the windshield and front windows. This defroster has its own button that you access when you want to defrost the rear window. You will notice the condensation or ice dissipating first along the lines until the entire window is clear.
What is the heated rear window?
The grid on the rear window is known as a rear window defogger. It is a thin electrical element that power runs through. The resistance in the element causes it to heat up, which warms the glass. The heat melts a small amount of ice and snow, and clears the fogginess from the rear window.
What do you do when your defroster doesn’t work?
Solution: When the engine and radiator are cool, top up the coolant. Then warm up your vehicle and see if the defroster starts working better. If the coolant level is low due to a leak, have a mechanic find it and fix it.
What is rear window defroster in car?
A defogger, demister, or defroster is a system to clear condensation and thaw frost from the windshield, backglass, or side windows of a motor vehicle. The rear window defroster was invented by German automobile engineer Heinz Kunert.
What happens if you damage defroster lines?
When your defroster grid line is scratched or damaged, the electrical current is broken, so the conductive paint repairs the overall electrical current.