Workshop Manuals Factory service & repair

Fiat Grande Punto Factory Service Manual (2005-2012)22 · Fault diagnosis

22 · Diagnostics

Horns working endlessly

Make: Fiat
Model: Grande Punto Factory Service Manual
Year: 2005–2012
Section: Radio and accessories etc.. › Horns working endlessly

‹ Prev Horns working out of tune Next › Subwoofer not working

Fault diagnosisHorns working endlessly

HORNS WORKING ENDLESSLY

1	RELAY CHECK	All OK	Problems encountered	Operation
		Results of the tests
	Remove the horn relay feed and check that the horns stop making a sound. Swap the relay for the horns T3 (20A) with the one for the main beam headlamps T2 and check that the horns work normally	Move on to Step 2	1. The horns continue to make a sound even without the relay 2. The horns continue to sound without being pressed even after the relays have been swapped	1. Restore the correct electrical connections See E3010 HORNS 2. Restore the relays to their places and move on to Step 3
2	RELAY CHECK	All OK	Problems encountered	Operation
	Check that the main beam headlamps are working properly. If the result is positive, remove the horn relay feed and check that the contacts do not show signs of oxidation or deformation	End of diagnosis	1. The main beam headlamps remain on in all conditions 2. There are irregularities at the engine compartment junction unit contacts	1. Replace the main beam headlamp relay (which was originally the one for the horns) 2. Renew the contacts. If necessary, replace the engine compartment junction unit Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R.
3	HORN ELECTRICAL CHECK	All OK	Problems encountered	Operation
	Connect a tester to the horn supply line and check the continuity and the insulation of the line	Move on to Step 4	Electrical faults: engine compartment junction unit defective	Replace the engine compartment junction unit Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R.
4	STEERING COLUMN SWITCH UNIT CHECK	All OK	Problems encountered	Operation
	Remove the steering wheel and check that there is nothing preventing the operation of the horn control switch	Move on to Step 5	Switch stuck in closed position	Replace the steering column switch unit. Op. 5550A10 STALK UNIT ASSEMBLY - R+R
5	ELECTRICAL CIRCUIT CHECK	All OK	Problems encountered	Operation
	The problem is due to the presence of a short circuit in the electrical system. Search for and eliminate this cause See E3010 HORNS	End of diagnosis	The fault persists	Contact technical service for further information on the problem

‹ Prev Horns working out of tune Next › Subwoofer not working

Parts & tools for this job For 2005 Fiat Grande Punto

Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.