Rear window defroster (Hyundai Elantra XD)

Contents: Examination ⇓ Repair of the heater conductive strip ⇓

Defrosting of the rear window is carried out by a heater, which is a series of parallel conductors sprayed onto the glass. When an electric current is passed through, the conductors heat up and defrost and clean the rear window from moisture. Current is supplied from a relay located in the engine compartment fuse box. If the glass is not clear after 15 minutes, you need to turn the heater on again for a second cycle, i.e. for another 15 minutes.

Examination

Warning: When testing the rear window defroster, wrap the voltmeter probe in aluminum or tin foil to prevent damage to the defroster conductive strip. To determine the break, you need to press the foil with your finger and move it along the conductive strip.

1. Start the engine and turn on the rear window defroster. Connect the negative probe of the voltmeter to the vehicle ground. Connect the voltmeter probe to the center of each rear window defroster strip in turn. The voltmeter should show a voltage of about 6 V.

2. If the voltmeter shows a voltage of 12 V, then the heater's conductive strip has a break on the side between the voltmeter connection point and the side of the heater connected to ground.

3. If the voltmeter shows a voltage below 0 V, then the heater conductive strip has a break on the side between the voltmeter connection point and the side of the heater connected to the positive terminal of the battery.

4. To determine the break point, move the probe along the conductive strip of the heater in the appropriate direction. The point where the voltage shown by the voltmeter changes abruptly is the break point.

5. Using an ohmmeter, measure the resistance of each conductive strip between the side terminal of the heater and the center of each strip. The section of the strip that has a break will have a resistance that is twice as high as the resistance of the rest of the heater strips.

Repair of the heater conductive strip

1. To repair the heater's conductive strip, prepare the following materials and tools:

conductive mass;
finely dispersed conductive mass;
sticky tape;
solvent;
brush.

The publication is borrowed from the website hyundaibook.ru

2. Wipe the glass area near the break in the heater's conductive strip with solvent and stick strips of adhesive tape on both sides of the conductive strip.

3. Apply three layers of conductive mass at 15-minute intervals. Remove the adhesive tape and wait until the conductive mass dries. After 24 hours, remove excess conductive mass with a sharp knife.