Technical Please help! 2006 Punto horn/alarm issue

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Technical Please help! 2006 Punto horn/alarm issue

Steffydoe

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Hi all

I am desperate for some help on this and at my wits end ! Haven't been able to drive my punto for 4 months because since the battery died in January something weird has happened.

We replaced the battery and randomly at night it sounds as if the horn is going off constantly - it's so loud it literally wakes up the neighbours and I was heavily pregnant at the time it started having to go out at 3 in the morning to sort it !

Anyway the only way it stops is by disconnecting the battery or turning the key in the ignition - obviously I went for disconnecting the battery because I couldn't leave the car running all night. It's done it numerous times so I've just given up trying to drive it and left it disconnected .

I've had various mechanics out who just tell me there is no fault because it doesn't happen at the time they reconnect the battery! Leave it a few hours and what do you know it happens throughout the night.

The car does not have a factory fitted or aftermarket alarm. I was advised by previous mechanic it just has an immobiliser.

He advised that it could be that the software has kind of reset itself from the battery change and disconnecting the battery could be resetting it all the time ...

Has anyone ever heard of this fault? Any ideas what I can do to sort it ? I am reluctant to pay fiat £70 per hour to look at it if they can't find the fault :( I've only had the car 6 months and not been able to drive it for 4 and I'm just wishing someone has heard of this fault before and can shed some light for me !!

Thank you
 
Last edited:
Hi all

I am desperate for some help on this and at my wits end ! Haven't been able to drive my punto for 4 months because since the battery died in January something weird has happened.

We replaced the battery and randomly at night it sounds as if the horn is going off constantly - it's so loud it literally wakes up the neighbours and I was heavily pregnant at the time it started having to go out at 3 in the morning to sort it !

Anyway the only way it stops is by disconnecting the battery or turning the key in the ignition - obviously I went for disconnecting the battery because I couldn't leave the car running all night. It's done it numerous times so I've just given up trying to drive it and left it disconnected .

I've had various mechanics out who just tell me there is no fault because it doesn't happen at the time they reconnect the battery! Leave it a few hours and what do you know it happens throughout the night.

The car does not have a factory fitted or aftermarket alarm. I was advised by previous mechanic it just has an immobiliser.

He advised that it could be that the software has kind of reset itself from the battery change and disconnecting the battery could be resetting it all the time ...

Has anyone ever heard of this fault? Any ideas what I can do to sort it ? I am reluctant to pay fiat £70 per hour to look at it if they can't find the fault :( I've only had the car 6 months and not been able to drive it for 4 and I'm just wishing someone has heard of this fault before and can shed some light for me !!

Thank you

Check the engine fuse box is dry inside and the plugs at the base
 
Could be a bad relay. Tell them to replace it.
 
I have had my fiat for over 3 years now and I was really pleased with the car. However, I have the same problem since end of April 2015 - horn going off early in the am, same scenario with waking up the neighbours etc. I depend on my car so the only way I can still drive it is when I get home from work in the evening I disconnect the cables from the horn itself (NOT the battery) and I reconnect them again first thing before I start the car in the morning.
It is very frustrating as like everyone else I have got one million other things on my mind - having to do this everyday is driving me crazy.

I had people looking at it, everything is fine! I wanted to buy a NEW relay - they are on ebay only and they are all USED. Reading on here I realise that is not the relay, box fuse is dry, all connectins read ok.

Where is the imobiliser located PLEASE? So I can have that one checked out too!

Many thanks!
 
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