Advice about alarm system

RedHotVolvo · Sep 5th, 2020, 09:49

Not something I want to shout about for obvious reasons, but my 2000 c70’s alarm has gone mute, you can activate it and it does all the other things like flashing the hazard lights and everything, just no siren. It locks and unlocks off the remote as normal. Obviously there’s a problem with the siren, first off, where is it? Also, is that black module inside the offside front wing anything to do with the alarm system? I’ve heard there’s an internal battery that can burst and leak on the alarm?

SteveSarre · Sep 5th, 2020, 10:32

Early V70s have the alarm siren under the right front wheel arch liner.
One of my C70s (2001 or 2002) had the siren under the left front. I dont know if all C70s are the same.

Yes the internal battery tend to fail which causes the alarm to go off (usually in the middle of the night). So worth looking at and probably replacing while you are at it. But not sure that that would cause the siren to not sound.

PS
OK yes the black box under the offside front wing is the siren unit.

HTH
Steve

miccurr · Sep 6th, 2020, 11:07

Yep, the module will cause the siren to go mute, it’ll also set the alarm off for no apparent reason albeit with no sound, just flashing hazards

Sep 5th, 2020, 09:49	#1
RedHotVolvo New Member Last Online: Nov 6th, 2022 14:37 Join Date: Jan 2010 Location: Glasgow	Advice about alarm system Not something I want to shout about for obvious reasons, but my 2000 c70’s alarm has gone mute, you can activate it and it does all the other things like flashing the hazard lights and everything, just no siren. It locks and unlocks off the remote as normal. Obviously there’s a problem with the siren, first off, where is it? Also, is that black module inside the offside front wing anything to do with the alarm system? I’ve heard there’s an internal battery that can burst and leak on the alarm?

Sep 5th, 2020, 10:32	#2
SteveSarre Premier Member Last Online: Today 17:13 Join Date: Oct 2004 Location: London/West Country	Early V70s have the alarm siren under the right front wheel arch liner. One of my C70s (2001 or 2002) had the siren under the left front. I dont know if all C70s are the same. Yes the internal battery tend to fail which causes the alarm to go off (usually in the middle of the night). So worth looking at and probably replacing while you are at it. But not sure that that would cause the siren to not sound. PS OK yes the black box under the offside front wing is the siren unit. HTH Steve __________________ V70 2.5 Turbo AWD Man. 1999 Red V70 2.5 10V Auto 1998 Green C70 T 20V Auto Conv. 2001 Blue, C70 T5 Auto Conv. 2000 Blue V70 2.5 Turbo AWD Auto 1998 Green, V70 2.5 10V Auto BiFuel 1999 Red (scrapped) V70 20v Auto 1999 Green (scrapped)

Sep 6th, 2020, 11:07	#3
miccurr Junior Member Last Online: May 14th, 2024 17:44 Join Date: May 2010 Location: Strabane	Yep, the module will cause the siren to go mute, it’ll also set the alarm off for no apparent reason albeit with no sound, just flashing hazards

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