V50 Electrics : - Alarm randomly going off

Montana · Feb 19th, 2018, 07:53

Hi all,

I remember when if first bought the v50 the previous owner mentioned it would randomly go off occasionaly.

Now a few weeks ago it started randomly going off ,so to rectify I disconnected the battery. All fine for a few weeks until Sunday morning at 0400 when I thought I heard a house alarm going off , turns out it was the Volvo. Unlocked it and waited a while and a different sounding alarm then started going off , so again disconnected the battery as a temporary measure.

Yesterday I removed the alarm siren fuse (f56) and now that car won't lock , had some other weird electrical behaviour this morning too , the rear fog won't stay on.

Any suggestions ?

HarjB · Feb 19th, 2018, 09:20

I had alarm going off randomly it ended up that my Galaxy Tablet if I left it in the car was setting it off. WIFI interference?

Montana · Feb 19th, 2018, 14:38

Quote:

Originally Posted by HarjB

I had alarm going off randomly it ended up that my Galaxy Tablet if I left it in the car was setting it off. WIFI interference?

Don't have anything like that left in the car. Which is probably a good thing now it's sat unlocked 😁

Bendolfc · Feb 19th, 2018, 21:09

Have you tried putting it on reduced guard to disable the inside movement sensor? On yours it's probably a menu option rather than a dedicated button like the pre face-lift models.

Montana · Feb 19th, 2018, 22:02

Quote:

Originally Posted by Bendolfc

Have you tried putting it on reduced guard to disable the inside movement sensor? On yours it's probably a menu option rather than a dedicated button like the pre face-lift models.

No i haven't , I have seen it referenced though so will have another look.

Would Vida help in this situation ?

iainmd · Feb 20th, 2018, 14:19

It's almost always one of 2 things.

1. Phone or WiFi device left inside car
2. Battery in siren unit died or dying. Replace the siren unit under the panel covering the plenum chamber.

phil1968 · Feb 21st, 2018, 16:34

https://www.volvoforums.org.uk/showthread.php?t=264425

Montana · Feb 21st, 2018, 20:17

perfect thanks

Feb 19th, 2018, 07:53	#1
Montana Master Member Last Online: Yesterday 19:47 Join Date: Oct 2016 Location: Accrington	Alarm randomly going off Hi all, I remember when if first bought the v50 the previous owner mentioned it would randomly go off occasionaly. Now a few weeks ago it started randomly going off ,so to rectify I disconnected the battery. All fine for a few weeks until Sunday morning at 0400 when I thought I heard a house alarm going off , turns out it was the Volvo. Unlocked it and waited a while and a different sounding alarm then started going off , so again disconnected the battery as a temporary measure. Yesterday I removed the alarm siren fuse (f56) and now that car won't lock , had some other weird electrical behaviour this morning too , the rear fog won't stay on. Any suggestions ? __________________ 2007 XC70 SE Lux D5 https://www.volvoforums.org.uk/showthread.php?t=305815 Previous: 2006 XC90 D5 , 2008 V50 2.0D

Feb 20th, 2018, 14:19	#6
iainmd Member Last Online: Yesterday 12:13 Join Date: Nov 2004 Location: Fife View Photos By: iainmd	It's almost always one of 2 things. 1. Phone or WiFi device left inside car 2. Battery in siren unit died or dying. Replace the siren unit under the panel covering the plenum chamber. __________________ Present: 2009 Volvo V50 1.6D DRIVe SE Past: 2004 Volvo S40 T5 SE

Feb 21st, 2018, 16:34	#7
phil1968 Master Member Last Online: Jul 27th, 2020 23:19 Join Date: Aug 2015 Location: Chatham	https://www.volvoforums.org.uk/showthread.php?t=264425 __________________ 2008 C70 D5 SE Lux Nav Geartronic

Feb 21st, 2018, 20:17	#8
Montana Master Member Last Online: Yesterday 19:47 Join Date: Oct 2016 Location: Accrington	perfect thanks __________________ 2007 XC70 SE Lux D5 https://www.volvoforums.org.uk/showthread.php?t=305815 Previous: 2006 XC90 D5 , 2008 V50 2.0D

Feb 19th, 2018, 09:20	#2
HarjB Junior Member Last Online: Feb 1st, 2022 22:22 Join Date: Nov 2015 Location: Derby	I had alarm going off randomly it ended up that my Galaxy Tablet if I left it in the car was setting it off. WIFI interference?

Feb 19th, 2018, 21:09	#4
Bendolfc Premier Member Last Online: Yesterday 12:51 Join Date: May 2010 Location: Liverpool	Have you tried putting it on reduced guard to disable the inside movement sensor? On yours it's probably a menu option rather than a dedicated button like the pre face-lift models.

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