Electrics: 850: Alarm not working

[Jod T5]

Originally Posted by Terry Wilkins

Thanks Jod,

I have just had a thought(steady!) the petrol flap lock does not operate when I lock the car so I am wondering if that could be the problem.

i doubt it tbh terry but a possibility....
cheers
jod

[Phil45]

Jod is the relay on the left (which is the same as mine) also the imob. relay?

Originally Posted by jod t5

ah the fox, i can be found there weeknights proping up the bar and at weekends slouched in the corner...lol its still very dark and the pool table draws in the "kids" but the green looks very pretty with the lights up and the tree in the pond....

there are three types of alarm on the 850, two of which will accept fob useage and one which wont...basically you will have to find out which receiver you have by checking under the steering column removing the relay and comparing it to either of these

if it is red it is unlikely that a fob will work although i know bb54 is in the process of working out what additional bits would be required for a conversion...
the set up for the alarms is different on the estate to the saloon in that the immobiliser works off fuse number 16 i would check this first of all as it may have been removed or damaged at some time....
check the fuse and your receiver and post back
cheers
jod

[Jod T5]

hi phil, yes it the advanced system with the bonnet sensor...the sensor if located in the n/s bonnet retaining clasp....
maybe try locking the clasps as if the bonnet was shut and then doing the resetting fuse process...
cheers
jod

[peterelectric]

The petrol filler flap locking bolt gets displaced / bent with use, this may be why it doesn't work.

[caveman]

hi, i had trouble with my alarm and central locking. jod told me it may be the tailgate lock, so i took (broke) the tailgate trim off and disconnected the lock from the central locking. the alarm works fine now, the remote works, the central locking works and if i want the boot opening i just use the key!
when the weather is better ill have a good look at the wiring but for now its fine.
regards
cavey

[Jod T5]

Originally Posted by caveman

so i took (broke) the tailgate trim off

lol...rob if i had a £ for everyone who had done that..., bay 13 recons its a doddle but i had done three and broke them all....
to repair i drilled 4 pilot holes thro the trim....two arrowed two wider

and held the top half on with the replacement kit from pfv.....i also broke the inside handle framework casing a little but they all went back on in the end...
cheers
jod

[rowleray]

Originally Posted by Jod T5

i would check all of the locks, boot first to ensure the immobilser connections on the microswitch are not damaged....
even tho the tailgate may lock the switch may not be informing the immobiliser that it is, therefore not allowing the immobiliser to arm....
cheers
jod

How do you test the tailgate alarm signal? Looking at the wiring diagram for locks in the haynes manual, only the 'blue and something' colour wire isn't mentioned so I assume that identifies the pin for the alarm? (I dont see a wiring diagram for the alarm in my manual)

But what should the pin do? make a circuit when the lock is open I presume?

[rowleray]

Hey Caveman. Are you saying if I disconnect the multiple then the alarm should work 9but have to lock the tailgate manually?
Ive tried this and my alarm still doesn't work - so that could suggest its NOT the tali gate - as the alarm still doesn't work

[rowleray]

Originally Posted by Terry Wilkins

Nope. All I have is a key. It is not a keyless central locking system.

Hi Terry.
Have you resolved this? I have the same issue, the alarm wont set - its never yet worked. My two-penneth is that Im sure 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.

My investigations and pleas for help continue!

[Luxobarge]

Originally Posted by rowleray

Hi Terry.
My two-penneth is that Im sure 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?

That's certainly true on my 97 V70

The fob I have doesn't work (a job I should really get around to sorting) so I always lock the car using the key only, and it does NOT set the alarm. HTH