Charles34

Hi Charles34, thank you for responding to my post.

I purchased a DELPHI alarm sounder unit (exactly as you described) and was waiting for an opportune time to tackle the job of replacing the unit.

My undestanding is that the unit starts to beep when the backup battery inside the DELPHI is running low. I've read that they last approximately 6 years.(My S Type is just over 4 years old)

Thanks also for the links. I have seen those but like you, I'm not sure my car is the same.

I did see one forum where a guy described taking the DELPHI unit apart and replacing the internal batteries (3 or 4 small round watch type). However, my problem has now stopped. I did nothing to the car, apart from leaving it unlocked whenever I was at home and could keep an eye on it. The problem continued for several weeks, mainly beeping during the night, which was very annoying.

I still have my DELPHI unit incase the problem starts again but for the last 3 weeks it has been fine with no beeping at all. I cannot explain why it started beeping or why it has now stopped.

I have a feeling it will happen again so I am still keen to find a fellow S Type owner/technician who can explain how to change the DELPHI unit. I have heard that they are connected to the car with tamper-proof bolts. (Just to make it a bit more difficult to change as a DIY job)

Thanks again

keithstype27

Hi Keiethstype27

Thanks for your feedback. My car is 4.5 years old. I have been able to reach the back of the Delphi alarm box, by lifting up the fuse box. Not possible to lift it up completely, as in the guide I mentioned previously, because on my model there is an additional loom that prevents this. I just had enough room to be able to disconnect the cable going to the Delphi box. Very hard to take the plug out of it. Did it with a plier. But you are right, the Delphi box seems to be fixed with a tamper-proof bolt at its lower point. The upper bolt is a normal one.

After disconnecting this Delphi box, I have no beeps any more and everything else seems to be ok, including the main alarm. By the way, I am not sure to fully understand the necessity of this Delphi Alarm. Probably a second level of security if somebody tries to disconnect the main alarm. But lifting the fuse box and cutting the Delphi cables with scissors can be done in less than 3 minutes, so it's not a very secure alarm and I won't take the pain to replace it or investigate further.

Hi. I have the same problem with Jaguar S type 2.7D 2007 (2008 model). I found this guide about

Removal of anti theft alarm/battery backup unit

on a forum : http://www.jaguarforum.co.uk/viewtopic.php?f=16&t=28494

I was not able to follow this guide up ot the end, because my car is not exactely the same as the one in the guide. What I found and could be the faulty unit is a black box on which it is written : DELPHI 2R83-19G229-C0. I find on this link the same box : http://www.befr.ebay.be/itm/JAGUAR-S-TYPE-2-7-D-ALARM-SOUNDER-SOUND-2R83-19G229-AC-/220802946417?pt=LH_DefaultDomain_212&hash=item3368e19571

Did you find a solution with your problem ? I shall try to just disconnect electrically this box and see what happens. I don't know if I am allowed to do that.

On my car, opening the doors sometimes stops this alarm (loud beeps, no horn), and sometimes not. And sometimes, even disconnecting the main battery does not stop these beeps, which make me think this unit has its own backup battery

I'll post here the following of this problem as soon as I have a solution.