244000513 - N21 HORNS WORKING OUT OF TUNE"

STEPOPERATIONS TO BE CARRIED OUTTEST RESULTS
1ELECTRICAL SYSTEM CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check that the horn circuit fuse seat is not oxidised or with loose contacts    See E3010 HORNSMove on to StepFuse seat oxidised or with loose contactsRestore to correct working order and replace the engine bay control unit if necessary    Op. 5505A13 SUPPLEMENTARY JUNCTION CONTROL UNIT IN ENGINE BAY - R R
2ELECTRICAL SYSTEM CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check that the horn circuit control relay seat is not oxidised or with loose contacts    See E3010 HORNSMove on to StepRelay seat oxidised or with loose contactsRestore to correct working order and replace the engine bay control unit if necessary    Op. 5505A13 SUPPLEMENTARY JUNCTION CONTROL UNIT IN ENGINE BAY - R R
3ELECTRICAL SYSTEM CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check the efficiency of horn control relay contacts    See E3010 HORNSMove on to StepContacts inefficientReplace the relay
4ELECTRICAL SYSTEM CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check the efficiency of the horn earth connection    See E3010 HORNSMove on to StepEarth inefficientRestore earth connection    See E3010 HORNS
5ELECTRICAL SYSTEM CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check the efficiency of the horn positive supply lead terminal    See E3010 HORNSMove on to StepTerminals inefficientReplace terminal
6CHECK ON CORRECT OPERATIONALL OKPROBLEMS ENCOUNTEREDACTION
Check the horn is working properlyHorn not working properlyChange the horn