Alarm not working

nicholasjgroom · Dec 11th, 2011, 19:31

I've just discovered the alarm isn't working, when I lock the car with the fob the indicators don't flash to show the alarm is active. when i unlock the car with the car the alarm doesn't sound when i open the door. and i sat in the car locked it with the fob and waved my arms around and the alarm still didn't go off so i think i can say it doesn't work. does anyone know where to start fault finding?

timmybrick · Dec 11th, 2011, 19:40

i have the exact problem when i unlock the car the indicators flash but not when i lock it any help would be great....

stevo48 · Dec 11th, 2011, 21:05

Check to see if the alarm module is connected, it is located under the battery tray bolted to the chassis leg. What tends to happen is the backup battery in the alarm module wears out and the alarm starts acting up or the module can develop problems and as a replacement from volvo is very expensive people tend to just disconnect the alarm.

volpete · Dec 11th, 2011, 21:14

Hi there first try the micro switch on the bonnet catch if you look at the catch the locking bar on the bonnet pushes a stainless steel strip down what i did was push it down with your little finger and operate the fob as if youre locking the car to see if it works normally, if not you will needto look at the alarm module on early models its under the battery carrier later models under front wing gatos might be able to help with a module if needed.Volpete

Loubaruch · Dec 11th, 2011, 23:01

My alarm failed after false triggering while travelling on the M6. It turned out to be the the micro switch on the bonnet lock as mentioned above.
In my case the alarm sounded for about 15 mins and then burnt out,so I fitted a 2nd hand one from a scrap yard it works perfectly and only cost I think £10.
This might help if you have a later car, mine is a 2003 V40:

http://bertram-hill.co.uk/VolvoV40BonnetLock.aspx

cyril · Feb 22nd, 2012, 13:15

Hi Guys.
Had the same problem after fixing my bonnet cable.
Alarm was not arming, no dash Led, and no flash from indicators.
This post helped me fix it.
The Bonnet microswitch tested ok. with a Multimeter.
Alarm Armed with bonnet up and microswitch depressed with A finger.
I tweaked the microswitch actuating strip towards the latch.
Problem Solved.
Thank you all for posting.
Saved another expensive trip to the dealer.

Chris

Antz · Feb 22nd, 2012, 16:30

my car has this problem and i suspect its the module which i found under the front wing covered in muck last weekend when changing the wing.

Might look into getting it sorted one day.

kebab10 · Feb 22nd, 2012, 19:33

Ah the Lemon car! so you have decide to keep it then? did you ever get the dispute settled?

As suggested the bonnet micro switch is a good culprit. Easy to adjust and cheap to replace if necessary.

baldmosher · Feb 25th, 2012, 12:29

Quote:

Originally Posted by nicholasjgroom

I've just discovered the alarm isn't working, when I lock the car with the fob the indicators don't flash to show the alarm is active. when i unlock the car with the car the alarm doesn't sound when i open the door. and i sat in the car locked it with the fob and waved my arms around and the alarm still didn't go off so i think i can say it doesn't work. does anyone know where to start fault finding?

Crap, that means mine probably doesn't work either!! Not sure how you'd test it but I have always assumed the immobiliser will stop TWOC and an alarm doesn't stop theft it just makes the thief run away faster with your stereo and ringing ears...

Quote:

Originally Posted by cyril

Hi Guys.
Had the same problem after fixing my bonnet cable.
Alarm was not arming, no dash Led, and no flash from indicators.
This post helped me fix it.
The Bonnet microswitch tested ok. with a Multimeter.
Alarm Armed with bonnet up and microswitch depressed with A finger.
I tweaked the microswitch actuating strip towards the latch.
Problem Solved.
Thank you all for posting.
Saved another expensive trip to the dealer.

Chris

I might try this first as it's cheapest

pds · Feb 25th, 2012, 19:29

My father just bought an S40 1.8 year 2000, and the alarm is making false trigering.

I suspect that it's either a bonet/door sensor, or the alarm module.

If I disconect/remove the module, is there any problem? Does the remote continues working to open and close the doors?

Also, is there any picutres, diagrams or howtos on howto disable the alarm?

Dec 11th, 2011, 19:31	#1
nicholasjgroom Member Last Online: Nov 28th, 2012 18:52 Join Date: Dec 2011 Location: high wycombe View Photos By: nicholasjgroom	Alarm not working I've just discovered the alarm isn't working, when I lock the car with the fob the indicators don't flash to show the alarm is active. when i unlock the car with the car the alarm doesn't sound when i open the door. and i sat in the car locked it with the fob and waved my arms around and the alarm still didn't go off so i think i can say it doesn't work. does anyone know where to start fault finding?

Dec 11th, 2011, 21:14	#4
volpete volpete Last Online: Mar 12th, 2015 14:56 Join Date: Nov 2010 Location: romford	alarm Hi there first try the micro switch on the bonnet catch if you look at the catch the locking bar on the bonnet pushes a stainless steel strip down what i did was push it down with your little finger and operate the fob as if youre locking the car to see if it works normally, if not you will needto look at the alarm module on early models its under the battery carrier later models under front wing gatos might be able to help with a module if needed.Volpete

Feb 22nd, 2012, 16:30	#7
Antz No I'm not the redhead Last Online: Nov 25th, 2022 09:49 Join Date: Jun 2009 Location: North Yorkshire Coast	my car has this problem and i suspect its the module which i found under the front wing covered in muck last weekend when changing the wing. Might look into getting it sorted one day. __________________ 1988 Volvo 240 GLT T5 Swap a T5 motor into your RWD Volvo:The Guide

Dec 11th, 2011, 19:40	#2
timmybrick Senior Member Last Online: Feb 27th, 2017 11:10 Join Date: Mar 2009 Location: birmingham	i have the exact problem when i unlock the car the indicators flash but not when i lock it any help would be great....

Dec 11th, 2011, 21:05	#3
stevo48 Premier Member Last Online: Jul 9th, 2020 20:08 Join Date: Dec 2007 Location: Halifax West yorkshire	Check to see if the alarm module is connected, it is located under the battery tray bolted to the chassis leg. What tends to happen is the backup battery in the alarm module wears out and the alarm starts acting up or the module can develop problems and as a replacement from volvo is very expensive people tend to just disconnect the alarm.

Dec 11th, 2011, 23:01	#5
Loubaruch Junior Member Last Online: Dec 26th, 2015 00:35 Join Date: Sep 2007 Location: Penrith	My alarm failed after false triggering while travelling on the M6. It turned out to be the the micro switch on the bonnet lock as mentioned above. In my case the alarm sounded for about 15 mins and then burnt out,so I fitted a 2nd hand one from a scrap yard it works perfectly and only cost I think £10. This might help if you have a later car, mine is a 2003 V40: http://bertram-hill.co.uk/VolvoV40BonnetLock.aspx

Feb 22nd, 2012, 13:15	#6
cyril Junior Member Last Online: Mar 15th, 2012 20:53 Join Date: Jan 2012 Location: Amesbury, Wiltshire	Hi Guys. Had the same problem after fixing my bonnet cable. Alarm was not arming, no dash Led, and no flash from indicators. This post helped me fix it. The Bonnet microswitch tested ok. with a Multimeter. Alarm Armed with bonnet up and microswitch depressed with A finger. I tweaked the microswitch actuating strip towards the latch. Problem Solved. Thank you all for posting. Saved another expensive trip to the dealer. Chris

Feb 22nd, 2012, 19:33	#8
kebab10 Premier Member Last Online: Jul 24th, 2015 16:09 Join Date: Sep 2008 Location: oxford	Ah the Lemon car! so you have decide to keep it then? did you ever get the dispute settled? As suggested the bonnet micro switch is a good culprit. Easy to adjust and cheap to replace if necessary.

Feb 25th, 2012, 19:29	#10
pds New Member Last Online: Feb 24th, 2023 22:18 Join Date: Feb 2012 Location: Évora	My father just bought an S40 1.8 year 2000, and the alarm is making false trigering. I suspect that it's either a bonet/door sensor, or the alarm module. If I disconect/remove the module, is there any problem? Does the remote continues working to open and close the doors? Also, is there any picutres, diagrams or howtos on howto disable the alarm?

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