With some of the above-mentioned vehicles, a fault in one of the rear window wiper motors can lead to various malfunctions of the system. These affect the functioning of both the rear window wipers and also the front windscreen wipers. In some cases, the rear window wipers work non-stop and/or they do not react to the various settings on the steering column switch.
Fault codes are not necessarily stored in the control unit.
Defects in the rear window wiper motor can be caused by water entering via the wiper shaft. Severe oxidation or dampness in the interior can lead to "electromigration" or to a permanent positive connection.
In such a case the wiper motors at the rear, as the culprits causing the problem, can first of all be disconnected so that (until the motors are replaced) at least the front windscreen wipers can function properly.
In this situation, the rear window wiper motor(s) has(have) to be replaced.
Important safety note
Technical information and practical tips have been compiled by HELLA in order to provide professional support to vehicle workshops in their day-to-day work. The information provided on this website is intended for use by suitably qualified personnel only.
Reprinting, distribution, reproduction, exploitation in any form or disclosure of the contents of this document, even in part, is prohibited without our express, written approval and indication of the source. The schematic illustrations, pictures and descriptions serve only for the purposes of explanation and representation of the instructions and cannot be used as a basis for installation or assembly work. All rights reserved.
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