2888437 - N21 HORNS WORKING "OUT OF TUNE"

When the sides of the steering wheel cover are pressed, the horns work but not properly and they sound out of tune.
Results of the tests
1HORNS CHECKAll OKProblems metOperation
Check the operation of the hornsContinue to Step 2Horns out of tuneAdjust the tone of the horns Op.   5550B34 
Horns faultyReplace the horns Op.   5550B30 
2CHECKING CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault starting from another symptom'