Contents: Examination ↓ Repair ↓
The heater consists of thin wires sintered with the glass surface.
Minor damage to wires can be repaired independently.
Examination
1. Turn on the ignition and heater. Connect a voltmeter between the heater terminals. If there is no voltage, check the fuse, switch and wires.
2. Place a folded strip of aluminum foil over the voltmeter probe and press it with your finger against the heater filament in the center.
3. If the voltage is 6V, then the thread is OK, if the voltage is 12V, then the thread is broken (the break occurs between the center of the thread and the mass). If the voltage is 0 V, then the thread is broken between the center and the power terminal of the heater.
4. If the threads are OK, connect the (-) terminal of the heater to ground. If the voltmeter readings change, the ground connection is unsatisfactory.
5. The location of the break in the thread can be determined by moving the aluminum contact on the voltmeter probe along the thread from the () terminal to the (-) terminal of the heater. Connect the voltmeter to the (-) terminal. At the location of the break, the voltmeter reading should drop sharply.
Repair
1. You can splice a broken heater thread using conductive epoxy compound Dupont N 4817 or equivalent.
2. Turn off the heater.
3. Using a steel wool pad, carefully polish the damaged area and wipe with alcohol.
4. Apply a mask of adhesive tape to the damaged area.
5. Prepare the resin according to the instructions.
6. Apply the composition to the gap in the mask, spreading it approximately 18 mm in both directions.
7. After 24 hours, remove the mask.