Toyota Corolla

1992-1998 of release

Repair and operation of the car

Toyota Corolla
+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engines
+ 4. Cooling systems, heating
+ 5. Fuel, exhaust systems
+ 6. System of decrease in toxicity
+ 7. Transmissions
+ 8. Coupling and half shafts
+ 9. Brake system
+ 10. Suspension bracket and steering
+ 11. Body
- 12. Electric equipment
   12.1. Safety locks
   12.2. The burned-through crossing points
   12.3. Automatic switches
   12.4. Relay
   12.5. Breakers of indexes of turns / alarm system
   12.6. The combined switch
   12.7. The switches installed on a steering column
   12.8. Lock of ignition and drum of the lock
   12.9. Switch of a heater of back glass
   12:10. Heater of back glass
   12:11. Radio receiver and loudspeakers
   12:12. Antenna
   12:13. Bulbs of headlights of head light
   12:14. Headlights of head light
   12:15. Replacement of bulbs
   12:16. System of day inclusion of headlights
   12:17. Engine of screen wipers
   12:18. Instrument guard
   12:19. Sound signal
   12:20. System cruise control
   12:21. System of the central lock
   12:22. System of window regulators
   12:23. Rear-view mirrors with the electric drive
   12:24. Safety airbag
   + 12:25. Electrical circuitries


12:10. Heater of back glass


The heater of back glass consists of a certain number of the horizontal heating elements which are sealed in the surface of back glass.

Small ruptures of elements can be eliminated, without removing back glass.


1. Turn a key in the lock of ignition and the switch of a heater of back glass in situation On.
2. At voltage measurement in the following two tests, wrap up a strip of aluminum foil around the probe of a negative wire of the voltmeter and press a foil to a wire a finger (1 probe of the voltmeter, 2 – a heater lattice wire, 3 – a foil).
3. Check tension in the middle of each of heating wires. If tension is equal to 5 volts, the wire in an order means (there is no gap); if tension is equal to 10 volts, the wire means it is broken off in a point somewhere between the center of a wire and the positive plug; if tension is equal to 0 volts, so the wire is torn between the center of a wire and weight
4. Connect the negative probe of the voltmeter to the mass of the car. Indications have to remain same.
5. For detection of a point of a gap connect the positive probe of the voltmeter to the positive plug of a lattice of a heater, concern a foil in which will wrap up the negative probe, to a heater lattice wire as it is possible closer to the positive plug and carry out by a foil with the negative probe on a wire towards the negative plug. The point in which indications of the voltmeter will rise from zero to several volts is a point in which the wire is torn.
6. If the heating element is not torn, the voltmeter will show lack of tension on a positive ring of a wire, and will show all increasing tension at approach by the negative end where it approximately will be equal 12 volts.


1. Eliminate a rupture of a wire, using the repair set which is specially developed for this purpose which can be got on an auto-market or in autoshop.
2. Before repair, switch off a heater and wait until it cools down within several minutes.
3. Smooth out area of a gap a small emery paper a little, then carefully clear it alcohol.
4. By means of an adhesive tape designate area of a gap.
5. Eliminate a rupture of a wire, being guided by the instructions attached to repair set.