Weak horn...

addey · Jul 1st, 2019, 10:58

07 D5 XC70. A while back, the horn stopped working. Then suddenly, it worked again, but with a very weak sound. Almost like a duck quacking

Since I had the grill down I checked the connectors, and have also checked the connectors in the engine compartment and in the steering wheel stalk. The only thing I haven't done yet is disconnecting the airbag to check the connector switches in the steering wheel. However, I don't really see how that would mean a weak signal, and not just the signal going away... Does anyone have a wiring diagram for the horn? Anyone have other tips for things to try?

Josh Wyatt · Jul 1st, 2019, 23:39

I would have thought your first port of call would be the horns themselves?
As you know, there are two separate horn units, perhaps only one is working? I have had vehicles with one of two not working thus sounding very weak.

As you’ve said, if there was an issue with the signal, voltage etc I would expect it to be totally dead. I suppose removing the front bumper and following the horn wiring back to look for defects could be another idea.

https://www.ebay.co.uk/itm/VOLVO-S80...oAAOSwN~Zbmg~r

https://www.ebay.co.uk/itm/VOLVO-S80...sAAOSwJFhbmhCC

Spike56 · Jul 2nd, 2019, 22:06

2 X Fiam motorcycle horns!!

Jul 1st, 2019, 10:58	#1
addey New Member Last Online: Jul 1st, 2019 23:12 Join Date: Oct 2016 Location: Drammen	Weak horn... 07 D5 XC70. A while back, the horn stopped working. Then suddenly, it worked again, but with a very weak sound. Almost like a duck quacking Since I had the grill down I checked the connectors, and have also checked the connectors in the engine compartment and in the steering wheel stalk. The only thing I haven't done yet is disconnecting the airbag to check the connector switches in the steering wheel. However, I don't really see how that would mean a weak signal, and not just the signal going away... Does anyone have a wiring diagram for the horn? Anyone have other tips for things to try?

Jul 1st, 2019, 23:39	#2
Josh Wyatt New Member Last Online: Apr 18th, 2024 22:53 Join Date: Mar 2016 Location: Oxford	I would have thought your first port of call would be the horns themselves? As you know, there are two separate horn units, perhaps only one is working? I have had vehicles with one of two not working thus sounding very weak. As you’ve said, if there was an issue with the signal, voltage etc I would expect it to be totally dead. I suppose removing the front bumper and following the horn wiring back to look for defects could be another idea. https://www.ebay.co.uk/itm/VOLVO-S80...oAAOSwN~Zbmg~r https://www.ebay.co.uk/itm/VOLVO-S80...sAAOSwJFhbmhCC

Jul 2nd, 2019, 22:06	#3
Spike56 Master Member Last Online: May 19th, 2024 22:30 Join Date: Feb 2013 Location: Orpington	2 X Fiam motorcycle horns!!

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