Rear Window Defroster Troubleshooting

QUICK GRID REAR WINDOW DEFOGGER REPAIR This product is designed to repair scratched or broken rear window defogger grid lines.

Rear window defroster troubleshooting. It takes a few minutes to clear the snow and by then the engine has warmed up enough to melt the frost clinging to the inside of the windshield and. The defroster grid is a series of parallel wires that run from one side of the rear windshield to the other. Although manufactures may use grid resistance variations the circuit configuration. The car defroster is an essential safety feature especially during those colder months.

Here are 12 common problems or steps to go through in order to troubleshoot the car defroster properly. Before consulting a mechanic do a visual inspection to rule out a common source of defroster trouble. Though information on some of these subjects is harder to find than others I thought I would begin this series of Master posts with the most common electrical problem a glass shops see rear window defroster malfunction. Snow has covered the entire car to a depth of several inches.

Available complete Clear View defoggers include the automatic timer and switch wire harness and installation kit perfect for new defroster installations. The two most popular are the Permatex Complete Rear Window Defogger Repair Kit No. If the fuse for the rear defroster is blown the defroster wont get power. Defrosters for all rear windows.

Most rear window defoggers are part of simple circuits that are easy to troubleshoot. It was a dark and stormy night. Clear View are the go-anywhere defrosters ready to install on any window on any vehicle anytime. Tape off the section of the rear defroster to be repaired.

In this video series I go through the process of diagnosing and repairing a rear window defroster that will not work. How to Repair a Rear Window Defroster. 09117 and the Syon Rear Defogger Repair Kit No. Good question on rear window defroster repair.

Most auto parts stores stock rear window defogger repair kits. As you might imagine the defrost lines that make up this grid are fairly sensitive to physical damage. Since I work for a company that makes defroster repair kits defroster repair accessories and aftermarket defrosters I talk to a lot of customers with this issue. The first step is to tape off the repair area.

The act of scraping or cleaning a rear window can sometimes sweep away enough of the metal to interrupt the circuit which in turn prevents electricity from being transmitted to that segment of the car defroster. However if the entire defroster isnt working it could point to a more complicated problem. This is a safety feature of modern cars that allows the drivers to be able to see out of the rear window in adverse weather. Check your owners manual for the location of the rear defroster fuse.

Determine which grid lines isare broken and where the repairs need to be made. Photo by Matt Wright 2012. The grid pattern of thin brown horizontal lines are made from a silver ceramic conductor which is silk screened essentially painted onto the inside of the rear window and then baked at high temperatures. The rear window defogger switch is located on the front of your vehicle and turns on the defogger on the rear window.

Those little lines on the rear window are made of conductive paint applied directly to the glass making the defroster compact and durable. If you find yourself in the car with a frosted window and a defroster that isnt working youll need to address the problem immediately. Automotive rear window defroster are sophisticated surface heaters. But it also means that any chip or scratch in that paint can render the system.

The grid on the back window consists of a resistance wire that heats up as current flows through it defogging or melting the ice from the glass. It sounds like a tab came off the defroster which is a common reason for defroster failure. Repair broken electrical contacts on your defogger or car window defroster. Start by going to the auto parts store and picking up a rear-window defroster-grid repair kit andor a defroster tab repair kit depending on the damage you need to fix.

Understanding electrical circuits and troubleshooting those circuits. The rear defroster system draws a lot of current so this is fairly common. A broken or disconnected tab can keep your rear defroster from working.

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