No way of switching the alarm system off of my 940

ToneyG · Apr 8th, 2019, 18:06

I have an N reg 940 turbo 2.3 petrol estate. The grey key fob for the alarm system got wet and went rusty over three years ago. A friend disconnected the alarm system. He does not remember how he did it.
I recently had a complete new exhaust system fitted for an MOT.
Just after that on a foggy night between stopping and starting to unload. The alarm system came back to life. The emergency call out man tinkered with it and I was mobile again. About a week later on a mizzley morning, the alarm system cut in again. It was parked up for three months after that because I took ill.
It was garaged to have the alarm problem sorted, points plugs and leads done. They garage said' It's stopped doing it now' meaning the alarm was not going off.
Last Saturday (misty) morning the alarm kicked back in when I turned on the ignition. It is a' volvo guard alarm system' A grey single button key fob (not working) Any ideas on how I can over ride or decommission the alarm system. Any help greatly appreciated.
Thanks
Toney G

Dirty Rooster · Apr 8th, 2019, 22:01

Ask that bloke there ;

Quote:

Originally Posted by ToneyG

... The emergency call out man tinkered with it and I was mobile again....

jonnyf90 · Apr 8th, 2019, 22:13

Once it's "deactivated", meaning starting the engine within 5 seconds of the alarm silencing (indicators still flashing), using the key to lock the car and unlock will keep it from arming, and you can use as usual.

If it somehow "resets", then there's some electrical gremlins somewhere bleeding into the system.

I have a wiring diagram for a 96 940 if that's any help? Might be able to trace a few wires and bypass it properly (cut and tape).

Cheers

jpliddy · Apr 10th, 2019, 06:57

Mine did play up there fuse is under bonnet on wheel arch or drivers side above your knees

jonnyf90 · Apr 10th, 2019, 07:12

Quote:

Originally Posted by jpliddy

Mine did play up there fuse is under bonnet on wheel arch or drivers side above your knees

Only fuses on a 940 are behind the ashtray.
960s have fuse boxes all over the place 🤣

TonyS9 · Apr 10th, 2019, 15:48

They all seem to go mad eventually.

Its under the steering column, unplug it and connect the 2 starter motor wires together.

If you really need I can PM the wire colours or picture of my bypass.

jpliddy · Apr 10th, 2019, 19:22

If the alarm was fitted in factory it's in engine bay if done at dealer's it's under dash area drivers side above knee's that what i was told. When i disconnected fuse under dash. The car started and ran fine that's only my experience of the grey type alarm fob mine is 940 tdi year 1995 with grey alarm fob

Apr 8th, 2019, 18:06	#1
ToneyG New Member Last Online: Feb 23rd, 2020 10:21 Join Date: Apr 2014 Location: Salisbury	No way of switching the alarm system off of my 940 I have an N reg 940 turbo 2.3 petrol estate. The grey key fob for the alarm system got wet and went rusty over three years ago. A friend disconnected the alarm system. He does not remember how he did it. I recently had a complete new exhaust system fitted for an MOT. Just after that on a foggy night between stopping and starting to unload. The alarm system came back to life. The emergency call out man tinkered with it and I was mobile again. About a week later on a mizzley morning, the alarm system cut in again. It was parked up for three months after that because I took ill. It was garaged to have the alarm problem sorted, points plugs and leads done. They garage said' It's stopped doing it now' meaning the alarm was not going off. Last Saturday (misty) morning the alarm kicked back in when I turned on the ignition. It is a' volvo guard alarm system' A grey single button key fob (not working) Any ideas on how I can over ride or decommission the alarm system. Any help greatly appreciated. Thanks Toney G Last edited by ToneyG; Apr 8th, 2019 at 18:09.

Apr 8th, 2019, 22:13	#3
jonnyf90 Grumpy git born too late! Last Online: Mar 20th, 2024 01:04 Join Date: Jul 2014 Location: Between Derby & Nottingham	Once it's "deactivated", meaning starting the engine within 5 seconds of the alarm silencing (indicators still flashing), using the key to lock the car and unlock will keep it from arming, and you can use as usual. If it somehow "resets", then there's some electrical gremlins somewhere bleeding into the system. I have a wiring diagram for a 96 940 if that's any help? Might be able to trace a few wires and bypass it properly (cut and tape). Cheers __________________ 1997 965 2.5 SE Manual 1996 944 Classic 2.3 LPT - SOLD/BROKEN/SCRAPPED 1997 S90 3.0 - SOLD to doingitsideways 2021 Škoda Octavia Estate L iV PHEV (Company)

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Apr 10th, 2019, 06:57	#4
jpliddy VOC Member Last Online: Feb 15th, 2024 17:04 Join Date: Dec 2006 Location: stoke on trent	Mine did play up there fuse is under bonnet on wheel arch or drivers side above your knees

Apr 10th, 2019, 15:48	#6
TonyS9 Premier Member Last Online: Apr 9th, 2024 21:44 Join Date: Jul 2009 Location: Holywood	They all seem to go mad eventually. Its under the steering column, unplug it and connect the 2 starter motor wires together. If you really need I can PM the wire colours or picture of my bypass.

Apr 10th, 2019, 19:22	#7
jpliddy VOC Member Last Online: Feb 15th, 2024 17:04 Join Date: Dec 2006 Location: stoke on trent	If the alarm was fitted in factory it's in engine bay if done at dealer's it's under dash area drivers side above knee's that what i was told. When i disconnected fuse under dash. The car started and ran fine that's only my experience of the grey type alarm fob mine is 940 tdi year 1995 with grey alarm fob

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