For the rear window heating system, the power supply may vary depending on the year of manufacture: before July 1977 - separate switching and control current via the rear window heating relay; after August 1977 - directly via the X-contact unloading relay and the rear window heating switch.
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The figure shows the prescribed distance from the windshield seal to the wiper blade; for right (1) and left (2) brush 1065 mm; 2-35 mm.
The figure shows the prescribed distance from the windshield seal to the wiper blade; for right (1) and left (2) brush 1065 mm; 2-35 mm.
Troubleshooting
Check the appropriate fuse, see the fuse table, chapter "Wiring and Fuses". Models manufactured before July 1977 have a fuse for the switching and control current lines.
Check that the wire connectors on the heated rear window are securely fastened.
Remove the switch and check, see the sections "Removing the switch" and "Checking the switch".
Check the operation of the relay.
If no defect is found, you should also check the wire along its entire length and the connection to ground.
A conventional test lamp, which has a high internal resistance, is only conditionally suitable for checking the filament. A device with light diodes is better suited
If a separate filament is damaged and the circuit is disconnected because of this, conductive varnish will help. This varnish, for example, is produced by the company "Doduko".
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