Before I get on to the thread subject a few things to share: 1- The "Service Alarm System" displays when you start up, 2- The Cruise Control light comes on (only if you press within the first few miles) and the cruise will work for a little while then just stops and will not come on again. Both of these issues have been present for so many years I can't remember, possibly 5 or 6? They're not as important as thread subject as far as use of car and feeling it is safe when you leave it somewhere.
Recently my wife mentioned that when she locks the car the lights flash as usual and she hears the doors lock, but she hears the sound of a door unlocking (driver's door). If she hits the lock on the fob the door locks and then immediately unlocks BTW: no lights flash after the initial lock. Does the same thing if we are inside the car and lock the doors from the lock button on the door.
Last night she just came in after shopping and said "this is really getting to be a PIA, I can't lock the car and if have stuff in it then need to go into another store how do I know it will still be there". I went out and observed all doors, which except for the drivers door were all locked. I pressed the lock button on the fob and the door locked (no light flash) and then immediately unlocked. I opened the door and noticed lights flashing (alarm I guess) but no siren. After a series of opening and closing doors it finally flashed the lights and stayed locked -> I think (with all doors closed) I unlocked the doors, opened the left rear door and closed it then pressed the lock button on the fob it finally stayed locked. Funny thing is, if I'm working on the car with the driver door unlocked (hit unlock button on fob once) and end up not going back to the car for a little while (fob is on tool box not in car and doors, hood, tailgate are all closed) it will self lock as it always has.
I've read about the cruise not working being related to the security module battery not recharging / needs new battery and the process for repair, but just haven't been able to get to it. The cruise not working is indeed a bummer and would be nice to have working again but just one of those things that isn't critical. However, not being able to lock the car is critical. HELP!?
Thinking this whole door not locking is related to "Service Alarm System" and "Cruise" not working???
Oh, doubt this is related to present situation but thought worth mentioning: about 10 years back I was using this car daily and would notice the passenger door just unlock and then lock then finally it wouldn't lock unless I pushed down the manual lock stick on the door. Then I noticed the window and side mirror wouldn't work at all. Turned out the passing door lock, window, mirror module needed to be replaced "and" new unit programed to the car by the Volvo dealer.
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