Horn not working

Electronic systems, stereo and Holden iQ, wiring, it all goes here....
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xten57
Posts: 11
Joined: Wed Jan 06, 2021 8:29 pm
Location: SoCal

Horn not working

Post by xten57 » Wed Sep 15, 2021 7:50 pm

Hello, all,

My horn had been working normally, and now it does not. I checked the fuse (F8 in the under-hood panel) and it was good, but I replaced it with a new one just to verify. Still no horn. I've read through a bunch of other threads on this site and can't find a solution. Everything else on the steering wheel still works as it did before the horn failed, so I don't know where else to look. Is there another fuse that could also control the horn circuit?

Any suggestions for trouble shooting would be greatly appreciated.

Thanks in advance,

Gerry

smwalker
Posts: 2044
Joined: Mon Jul 29, 2013 6:44 am
Location: Azusa,CA

Re: Horn not working

Post by smwalker » Wed Sep 15, 2021 11:46 pm

What year?

In the 11-13 it's a brown wire
In the 14+ it's a Green with a white stripe

both in the passenger footwell:
More info here:
viewtopic.php?f=21&t=2393#p19287
Steve Walker
Azusa, CA
'11 PPV 9C3 Huron White

xten57
Posts: 11
Joined: Wed Jan 06, 2021 8:29 pm
Location: SoCal

Re: Horn not working

Post by xten57 » Thu Sep 16, 2021 1:54 am

Thanks for your reply, Steve. My car is a 2013 9C3. I'll check for a broken wire, although I can't understand how that could happen. The horn was working fine.

Gerry

xten57
Posts: 11
Joined: Wed Jan 06, 2021 8:29 pm
Location: SoCal

Re: Horn not working

Post by xten57 » Fri Oct 01, 2021 10:13 pm

Is there more than one fuse controlling the horn? Any relays?

Thanks again,

smwalker
Posts: 2044
Joined: Mon Jul 29, 2013 6:44 am
Location: Azusa,CA

Re: Horn not working

Post by smwalker » Mon Oct 04, 2021 9:47 pm

Yes fuse and relay controlled by the BCM both model years:

WN - 2014 + : https://www.chiltonlibrary.com/content/ ... 601720.pdf
WM - 2011- 2013: https://www.chiltonlibrary.com/content/ ... 662598.pdf
Steve Walker
Azusa, CA
'11 PPV 9C3 Huron White

xten57
Posts: 11
Joined: Wed Jan 06, 2021 8:29 pm
Location: SoCal

Re: Horn not working

Post by xten57 » Sat Oct 16, 2021 12:28 am

smwalker wrote:
Mon Oct 04, 2021 9:47 pm
Yes fuse and relay controlled by the BCM both model years:

WN - 2014 + : https://www.chiltonlibrary.com/content/ ... 601720.pdf
WM - 2011- 2013: https://www.chiltonlibrary.com/content/ ... 662598.pdf
Steve, thanks again. I found the relay, it's R16 in my 2013 fuse panel. I checked it and it's good. However, I dug around under the glove box and found a pair of wires that had become disconnected from a butt connector. I cut out the connector and replaced it with a good one, and used some good crimpers to re-make the connection.

Now, I have a horn again.

Thanks to everyone else who helped on this.

Gerry

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