| 1. Disconnect the battery from weight. |
| 2. Hook and get the switch from the panel and disconnect a socket. |
| 3. Check up chain presence between conclusions 1 and 3 sockets from outside the relay (fig. Numbering of conclusions of a socket of the switch of heating of back glass see). If between conclusions there is no chain check up a lamp. |
| 4. Check up the heater timer. For this purpose connect (+) - a conclusion of the battery to a conclusion 2, and (-) - a conclusion – with a conclusion 4 switches, between (+) - a conclusion of the battery and a conclusion 6 connect a lamp capacity of 3,4 Vt (fig. Check of operation of the timer of a heater of back glass see). Press the switch, – test and control lamps of the switch should light up and later 12–18 mines go out. Otherwise the switch replace. |
| 5. Check up a chain from outside a switch socket. |
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6. Between a conclusion 4 and weight the chain should be constantly. |
| 7. When the ignition key is in positions ACC or LOCK between conclusions 2 or 6 and in weight pressure should be absent. |
| 8. When the ignition key is position ON by conclusions 2 or 6 and pressure should be weight. |
| 9. Connect conclusions 4 and 6 and be convinced of normal work of a heater. |
| 10. If results of one of checks negative the switch replace. |
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11. Check up the heater relay, – between conclusions 1 and 2 should be a chain. At запитывании conclusions 1 and 2 (12) chain should be between conclusions 3 and 5. The relay is in the block of safety locks in salon. |
| 12. If results of one of checks negative the relay replace. |