The above vehicles can experience signal horn failure due to a fault in the steering column´s electronic module.
The fault often occurs after driving long distances with the lights switched on. A contact weakness in the steering column module can cause the signal horn to malfunction.
The vehicle manufacturer is already aware of the problem. As part of a service campaign, the vehicles will be checked and new software loaded if necessary. A blue dot will then be stuck on the back of the steering wheel.
Nevertheless, one may assume that for various reasons not all vehicles have been checked and repaired.
Please take this information into account if there are complaints about the signal horn.
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.
The reprinting, distribution, reproduction, exploitation in any form and 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, figures and descriptions are for explanation and presentation of the document text and cannot be used as a basis for installation or design. All rights reserved.
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