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. Electroschemes

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 a 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 the situation On.
2. At voltage measurement in the following two tests, wrap up a strip of aluminum foil round 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 (the gap is not present); if tension is equal to 10 volts, the wire means 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 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 a car market or in autoshop.
2. Before repair, switch off a heater and wait until it cools down within several minutes.
3. Smooth out gap area a small emery paper a little, then carefully clear it alcohol.
4. By means of an adhesive tape designate gap area.
5. Eliminate a rupture of a wire, being guided by the instructions attached to a repair set.