Question about Fiat Cars & Trucks
64 plate fiat ducatto Checked fuses, checked horn,checked switch :-(
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Posted on Jan 02, 2017
hi not aware of whether or not you solved horn problem? ie location but for info you will find horn just in front of the crossmember in front of radiator (where the bonnet closes onto ) horn is on the nearside looks like a disc secured by a nut+washer it has a plug on wire connector ps these horns are prone to fault but you might try tapping the horn gently with horn operated/pressed you can purchase a more reliable wind tone/horn and fitto same bracket and replace the terminalplug to connectors for new type easy diy check E BAY for hornes on car accessories ? hope this helps?
Posted on Oct 21, 2008
this problem is caused by the rotating contact under the steering wheel that connects the horn (and airbag) button to the steering column wiring harness, this contact is commonly called the clock-spring ribbon contact. WARNING! Before u replace this u must remove the wheel and the airbag module on the wheel, the airbag must be disarmed, the easiest way is to disconnect the battery 30 minutes prior to starting work, this always ample time for the system control circuit capacitors to drain down.
Posted on Jan 23, 2009
hi did you also checked the horn itselfs. when you take out the horn and look at the back you will see a adjust srew with sealingmastic on it. you can remove the sealingstuff and try to adjust the horn. this only works if the coil is not broken. but first you have to check the connection inside the steeringwheel. make sure the switch in the steeringwheel is making contact to earth. if this all doesnt work you have to buy a new one goodluck.
Posted on Feb 16, 2010
Horns are pretty simple units and don't need to feed through the ECU.
When you say you have checked the wiring and tested it, do you mean the wiring at the horns? or the wiring at the horn button on the steering wheel pad or where ever your horn button is located?
Sometimes the horn button breaks usually due to wear, If that is the case you will need to remove the horn pad or button and check/repair or replace. If this is working then most likely your horns are dead, not usual as they are fairly robust but not unheard of.
Posted on Aug 01, 2011
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Tips for a great answer:
If the test lamp illuminates, refer to the Horn Test.
Ignition OFF, disconnect the inline harness connector C275. Ignition ON, test for B+ between the horn relay control circuit terminal B and ground.
If less than B+, test the control circuit for an open/high resistance. If the circuit tests normal, replace the underhood fuse block.
Momentarily connect a 3-A fused jumper wire between the control circuit terminal B and ground. The horns should work.
If the horns do not work, replace the underhood fuse block.
If all circuits test normal, test or replace the horn switch
The PCB relay horn system consists of the following components:
Horn PCB relay
Body control module (BCM)
HORN fuse 15 A
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