Workshop Manuals Factory service & repair

Fiat Ducato Factory Service Manual (2002-2006)23 · Fault diagnosis

23 · Diagnostics

Horns not working

Make: Fiat
Model: Ducato Factory Service Manual
Year: 2002–2006
Section: Radio and accessories etc. › Horns not working

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Fault diagnosisHorns not working

HORNS NOT WORKING

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
1	ELECTRICAL SYSTEM CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the condition of the horn circuit fuse See E3010 HORNS	Move on to Step	Fuse blown	Find out the reason for the blown fuse and repair the circuit See E3010 HORNS
2	ELECTRICAL SYSTEM CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check continuity between earth and horn circuit relay input See E3010 HORNS	Move on to Step	1. Connections inefficient	1. Restore correct operation
		Move on to Step	2. Horn button defective	2. Replace horn button See E3010 HORNS
3	ELECTRICAL SYSTEM CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check: Correct horn control relay operation Correct horn control relay power supply	Move on to Step	1. Relay defective.	1. Replace the defective relay
		Move on to Step	2. Relay supply fault	2. Restore correct operation See E3010 HORNS
4	ELECTRICAL SYSTEM CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check horn earth connection efficiency See E3010 HORNS	Move on to Step	Earth inefficient	Restore earth connection See E3010 HORNS
5	ELECTRICAL SYSTEM CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the efficiency of the horn positive supply lead See E3010 HORNS	Move on to Step	Connections inefficient	Restore supply connection See E3010 HORNS
6	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check correct horn operation		Horn not working	Change the horn See E3010 HORNS

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Parts & tools for this job For 2002 Fiat Ducato

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