Ferrari Mailing List: Re: I succeeded to make my horn problem even worse.

[Charles Perry (charles]

This is definitely a grounding issue of some sort. When the car is off the horn 
circuit has a workable ground and so functions. When you start the car, 
something like a relay somewhere changes state and alters a path that was 
ground to one that is now not ground. And so you lose the horn. It's obviously 
an unintentional ground path letting it work when the car is off, but a ground 
nevertheless. May have to do with the wire you cleaned up that has now killed 
that issue. I don't have 308 wiring diagrams to know where the horn or the horn 
switch is supposed to ground, but that's where I'd be looking.

-- charles



 

-----Original Message-----
From: Ferrari <ferrari-bounces+charles=carolinasound.com [at] ferrarilist.com> 
On Behalf Of Michel Savard
Sent: Saturday, June 1, 2024 4:25 PM
To: Charles Perry <charles [at] carolinasound.com>
Cc: The FerrariList <ferrari [at] ferrarilist.com>
Subject: [Ferrari] I succeeded to make my horn problem even worse.

Good day, I cleaned my 2 red horns (they were really dirty) this week and put 
them back today.

I took the horn button off, it was very easy. I saw right away a piece of black 
electric tape about 1” long loose barely touching the black wire which was 
damaged. Very tiny cut all around the black wire, I can easily see the copper 
wire (or whatever it is). It’s not cut or severely folded, it’s just missing a 
tiny line of black around all around. I imagine someone put the tape around the 
cut and the tape eventually came loose. I’ve had the car for 23 years, never 
took out the horn button.

I put new tape around the cut. Cleaned the female connection on the horn button 
with sandpaper, dust it. Now there is absolutely no sound at all. Completely 
dead horn. No key in: Nothing (remember it used to work with no key in). Key in 
and turned at “ON” (tested all the lights), nothing (it used to work). I 
switched the relays (Bosch 0332-019151) to see if that could be the problem. No 
change, same results.

I didn’t start the car, it took me 90 minutes to do all that. I was too 
frustrated. Tomorrow I’ll get the car out and drive it that way (no horn).
I hope my mechanic finds the problem. No room until late june. This is annoying.

Michael Savard (1981 308 GTSi)
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