850 Cars: - 850 alarm wont arm

rowleray · Oct 8th, 2021, 11:21

Hi
Has anyone got any advice, know of any troubleshooting document for an 850 alarm that wont arm?
On locking, the red light doesn't start flashing and Ive tested with the car locked, window open, opening the door by leaning in - no alarm.
Ive checked the bonnet catch as that was on one thread as common - and that looks to be working (no circuit in one position, there is a circuit in the other (I forget which way around it was, but it changes open vs closed!))
Appreciate any help.
Cheers

rowleray · Oct 12th, 2021, 13:14

Can anyone help out there?

I read somewhere that the alarm can ONLY be set using the remote fob and not the key? Not sure if thats true, can anyone comment?

My restoration 850 only came with 1 key and no fob. I have got a second key up and working and I am on my second fob (theory is I bought the wrong type fob first time - for later years cars) neither seem to program up and lock / unlock the car / set the alarm.

Can anyone advise?

Should the alarm set with the driver door lock?
If not why wont it? any ideas / suggestions?

I have checked both bonnet and tail gate locks - they seem to be sending the correct signal (nothing when locked, 12v when unlocked)

Can any 1994 850 owner please post a picture of their working fob? - so I can see if I have the correct one? Maybe the two I have purchased so far still aren't right?

Luxobarge · Oct 12th, 2021, 14:18

I can confirm that (at least on a 97 V70) the key does NOT set the alarm. I don't have a working fob and so I always lock the car with the key, and it never sets the alarm.

If you've been just using the key, that's probably why your alarm doesn't arm! You need to get the fob working first, then worry about whether the alarm arms - with a bit of luck it will!

4x4 · Oct 12th, 2021, 14:31

Just been out and tried my 850, the alarm will only set when powered on with the remote control, the red light only comes on when the alarm is set.

Using the key only locks the doors, nothing else.

Also the deadlocks only set when using the remote control, if you use the key to lock the car the deadlocks do not work.

Oct 8th, 2021, 11:21	#1
rowleray Junior Member Last Online: Jan 24th, 2024 13:11 Join Date: Oct 2021 Location: Doncaster View Photos By: rowleray	850 alarm wont arm Hi Has anyone got any advice, know of any troubleshooting document for an 850 alarm that wont arm? On locking, the red light doesn't start flashing and Ive tested with the car locked, window open, opening the door by leaning in - no alarm. Ive checked the bonnet catch as that was on one thread as common - and that looks to be working (no circuit in one position, there is a circuit in the other (I forget which way around it was, but it changes open vs closed!)) Appreciate any help. Cheers __________________ Ray 1994 850 Estate T5 & 2011 XC70 D5

Oct 12th, 2021, 13:14	#2
rowleray Junior Member Last Online: Jan 24th, 2024 13:11 Join Date: Oct 2021 Location: Doncaster View Photos By: rowleray	Can anyone help out there? I read somewhere that the alarm can ONLY be set using the remote fob and not the key? Not sure if thats true, can anyone comment? My restoration 850 only came with 1 key and no fob. I have got a second key up and working and I am on my second fob (theory is I bought the wrong type fob first time - for later years cars) neither seem to program up and lock / unlock the car / set the alarm. Can anyone advise? Should the alarm set with the driver door lock? If not why wont it? any ideas / suggestions? I have checked both bonnet and tail gate locks - they seem to be sending the correct signal (nothing when locked, 12v when unlocked) Can any 1994 850 owner please post a picture of their working fob? - so I can see if I have the correct one? Maybe the two I have purchased so far still aren't right? __________________ Ray 1994 850 Estate T5 & 2011 XC70 D5

Oct 12th, 2021, 14:18	#3
Luxobarge Premier Member Last Online: Yesterday 09:37 Join Date: Jan 2011 Location: Horne (Nr. Horley)	I can confirm that (at least on a 97 V70) the key does NOT set the alarm. I don't have a working fob and so I always lock the car with the key, and it never sets the alarm. If you've been just using the key, that's probably why your alarm doesn't arm! You need to get the fob working first, then worry about whether the alarm arms - with a bit of luck it will! __________________ Some people are like Slinkies, they serve no useful purpose but they still bring a smile to your face when you push them downstairs.

Oct 12th, 2021, 14:31	#4
4x4 Premier Member Last Online: Today 09:15 Join Date: Dec 2017 Location: North of Hadrian's Wall & South of Antonine's Wall View Photos By: 4x4	Just been out and tried my 850, the alarm will only set when powered on with the remote control, the red light only comes on when the alarm is set. Using the key only locks the doors, nothing else. Also the deadlocks only set when using the remote control, if you use the key to lock the car the deadlocks do not work. __________________ MY2010 XC90 SE (M66-manual) Magic Blue (467) Sold MY1997 850 GLT (62,000 miles) Silver Sand (419) MY2005 V70 2.5T (66,000 miles) Willow Green (471) Volvo 850 GLT website Last edited by 4x4; Oct 12th, 2021 at 15:06.

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