3360321 - N21 HORNS WORKING "OUT OF TUNE"

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Results of the tests
1CHECKING ELECTRICAL EQUIPMENTAll OKProblems metOperation
Check that the horn circuit fuse seat is not oxidised or with loose contacts See   E3010  HORNS Continue to Step 2Fuse seat oxidised or with loose contactsRestore to working order and change engine bay control unit if necessary Op. 5505A13
2CHECKING ELECTRICAL EQUIPMENTAll OKProblems metOperation
Check that the horn circuit control relay seat is not oxidised or with loose contacts See   E3010  HORNS Continue to Step 3Relay seat oxidised or with loose contactsRestore to working order and change engine bay control unit if necessary Op. 5505A13
3CHECKING ELECTRICAL EQUIPMENTAll OKProblems metOperation
Check efficiency of horn control relay contacts See   E3010  HORNS Continue to Step 4Contacts inefficientChange relay
4CHECKING ELECTRICAL EQUIPMENTAll OKProblems metOperation
Check the efficiency of the horn earth connection See   E3010  HORNS Continue to Step 5Faulty earthRestore the earth connection See   E3010  HORNS
5CHECKING ELECTRICAL EQUIPMENTAll OKProblems metOperation
Check the efficiency of the terminal at the cable for the positive horn supply See   E3010  HORNS Continue to Step 6Terminal inefficientChange terminal
6CHECKING CORRECT OPERATIONAll OKProblems metOperation
Check that the horn is working properlyHorn not working properlyReplace the horn Op.   5550B30  Search for the fault starting from another symptom'