Workshop Manuals Factory service & repair Fiat
Fiat 500 Factory Service Manual (2007-2024)22 · Fault diagnosis
22 · Diagnostics

Horns not working

Make
Fiat
Model
500 Factory Service Manual
Year
2007–2024
Section
Radio and accessories etc.. › Horns not working
Fault diagnosisHorns not working

HORNS NOT WORKING

1.2 8v, 1.3 Multijet, 1.4 16v

Test results
0PRELIMINARY CHECKSAll OKProblems encounteredOperation
Check, by operating the horn control on the steering wheel, that the travel is correct.Move on to Step 1Travel not correct.

Remove the steering wheel

Op. 4110A10 STEERING WHEEL - R+R FOR REPLACEMENT OR CHECKS

and check that there are no impediments to the travel.

If there are problems, replace the faulty component

1FUSE INTERVENTION CHECKAll OKProblems encounteredOperation

Check that the horn protective fuse in the engine compartment control unit has not blown

See E3010 HORNS

Move on to Step 2The fuse has blown.Replace the fuse and find out what caused it to blow.
2RELAY CHECKAll OKProblems encounteredOperation
Check that horn control relay T03 is working properly.Move on to Step 3Relay defectiveReplace the relay
3RELAY ELECTRICAL CHECKAll OKProblems encounteredOperation

Undo the fastenings for the engine compartment control unit

Op. 5505A13

and check, using a tester, that the power supply for the horn control relay is correct.

See E3010 HORNS

Move on to Step 4Power supply interruptedRestore the correct power supply
4HORN CHECKAll OKProblems encounteredOperation

Remove the horn

Op. 5550B30 L/H OR R/H HORN (ONE) - R+R

and connect it directly to a battery charger. Check that a sound is produced and that there are no unpleasant noises (knocking/buzzing).

End of diagnosisSound faulty or no sound produced.

Replace the horn

Op. 5550B30 L/H OR R/H HORN (ONE) - R+R

Parts & tools for this job For 2007 Fiat 500

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