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 notice
The following technical information and tips for practical use have been set up by HELLA in order to offer professional support to automotive workshops in their daily work. The information available here on this website is only to be used by appropriately trained specialist staff.
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