- Remove facings of a control panel and facing of the panel of switches (Head the Body).
- Give screws and remove the switch of a heater of glass of a door of a back from facing.
- By means of the wire equipped with clips short-circuit the plug three on weight, then with the second wire provide giving on the plug of 1 switch of tension in 12 V.Esli a lamp of the switch does not light up, replace it.
- If the lamp of the switch lights up, remove wires and connect an ohmmeter (or a sampler with the independent power supply) between switch plugs 2 and 3, then press the button of the last. Indications of an ohmmeter should not be less than 1 Ohm. Otherwise replace the switch.
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