In the above vehicle, the multi-function control unit and/or or the signal horn may malfunction. One possible cause in some vehicles may be a defect in the wiring harness of the brake pedal switch that can scrub at the steering shaft due to unfavourable positioning.
As a corrective action, the wiring harness should be checked, and damaged cable insulations should be repaired with a repair kit. In addition, pull a suitable protective cover onto the wiring and fasten the harness again.
If necessary, the harness must be replaced, although this is associated with a significant amount of work.
Finally perform a functional test.
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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