1. Wrap the ends of the tester probes with aluminum foil as shown.
2. Turn the ignition key to the ON position (II).
3. Turn on the rear window defroster and make sure that there is a gap between the contacts (+) And (-) there is battery voltage.
If there is no battery voltage, check the following.
- Serviceability of the relay of a heater of back glass (see above).
- Breakage and condition of the connection e / wiring.
- State «masses» (G401, G552).
If there is battery voltage, check the following.
4. In the centers of each heating element, connect (+) voltmeter, and (-) connect a voltmeter to the contact (-). Make sure the voltmeter shows a voltage of approx. 6V.
If the voltage is correct, the heating element is OK.
If the voltage is not as specified, repair the heating element.
- If there is battery voltage, the break is between the center and the contact (-).
- If there is no voltage, the break point is between the center and the contact (+).