1994 850 turbo wagon alarm and remote (2 button type)entry problems. My alarm won't activate (light blinking on dash) when all doors are locked. The fuel lid door stays unlocked all the time. The remote locks and unlocks only the 4 doors, it does not lock the 5th door or the fuel lid door. If I manual lock the 5th door the remote will unlock the 4 doors but will not lock the 4 doors unless I use the key, the 5th door remains lock during this time. If I use the key in the 5th door I can lock and unlock all doors. If I use the key in the drivers door I can lock and unlock only the 4 doors. Any help is appreciated. Thanks, ST

Yep, I have a similar problem on my 1994 850 wagon ! I think its a flaw in the system since we both have weird things with the alarm system. Sometimes mine will "Unlock" all the doors but wont "Lock" them (from the remote). But my light always blinks like they system is "active" and fuel door is responsive with the doors, but the tailgate isnt! All I can figure is the "system" is on a loop, and if a circuit is broken then the whole system goes wacky ! Seems like somewhere the circuit has been breached, why, how, I dont know, but checking wires at the "pinch points" would be a good start. Tell me how if you find it before me as im really involved in my 960 at the moment. Thanks, Dubs

The system will not set the alarm if the car is not totally locked up. This also happens when the hood is not securely closed.
In your case, it sounds like the locking motor for the rear hatch is no longer working. That could be due to a bad wire up in the hinge area. Worth checking.

Klaus
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I still miss my 164 and my 854T. Just driving a V70R :)

I locked the 5th door manual, key, and it did activate the alarm, THANKS! But, the remote will only unlock the 4 doors and leaves the 5th door locked. The remote cannot lock the 4 doors if the 5th door is locked. If all doors are unlocked the remoter will only lock the 4 doors leaving the 5th door unlocked. Do I remove the trim like accessing the tailgate supports to look at the wiring near the hinges (rear door)? What about the locking mechanism, anything to look at there? ST

Yep, right where the wires do all of the flexing when you open and close the hatch.
All you get by removing the panel on the hatch is access to the motor. My guess is still that the motor is OK and would work if it only got some electrons.

The key and remote do things differently. My 1995 remote never did work so using just the key worked the same all of the time.

Klaus
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I still miss my 164 and my 854T. Just driving a V70R :)