All electronics seem okay. When locking the car the tailgate lock remains unlocked. The alarm goes off if the car is locked and I simply open the tailgate. No sounds come from the tailgate mechanism however. System worked then just stopped locking, No apparent damage visible. Now only one action on the level where before the level would move twice if the car was locked and the tailgate was opened using the remote.
Have you tried using the key at the tail gate, ,open with the key then move then push the locking mechanism open with a screwdriver the latch close while the door/gate was open, push it back open use some force. Hope this help if is a mechanical issue and not electrical it doesn't matter .
SOURCE: volvo v70 2001 central locking fault
you need the alrm box replaced, it obvasly is defaulting(going bad).
any dealer can do this for you.
SOURCE: Alarm haywire, can't override anti-theft system or turn on car
The Alarm on my Mercedes ML320 sounded every night, then it started doing it more often, Showed it to the dealer he says it's the 'Tow Sensor', that needs to be repaced. $700, down the drain. I have already started hating this car, it eats $500-600, every 6 months...
SOURCE: Volvo v70 1999 tailgate won't open
I had the same problem on my '98 V70 - my rear liftgate would not open. The "rear lift door open light" was on. I guess it was some kind of electronic problem in the locking mechanism. But it could have been something else like the metal bar that extends from the outside handle down to the mechanism had slipped off (unusual design seems like it should be connected instead of just sitting on a plastic latch handle) or maybe it was bent because this car had been hit in the rear as I found out looking around in there. Anyway, I took off the interior panel and inside handle. There was a large torx bolt that had to be removed if I was going to replace the mechanism. I later found out that there were two more once I got the gate open. I took a photo of the way everything was connected so I would have a record just in case I needed it. I bought a new lock mechanism. There is a thin piece of plastic down near the bottom on the mechanism that somewhat blocks a screwdriver or other tool from reaching in and opening the door that way. So I had to start removing things. I disconnected the power first. I removed the two screws I could reach which let the part that was connected to the connector be removed out of the way. I removed the metal bars that went from the outside door handle and the lock down to the mechanism. I still couldn't reach where I needed to. So since I had the part I began to slowly break away pieces from the mechanism. They are plastic so they broke off without much trouble but it did take a little work. Finally I reached down to the thin plastic part I referred to earlier that covers the part that unlocks your liftgate and pulled it enough off of it to get access to the release. One last try with a screwdriver let me push the actual release and the door opened! There was much rejoicing. Then I removed the old and replaced with the new. Reconnected everything checked and rechecked. It's working so far. That's how I did it.
SOURCE: 1999 Volvo V70 - The tailgate door will not unlock
you will need new t gate lock assembly parts inside are worn out
SOURCE: using the remote or the door lock inside the car not working
remove the door panels and give everything in sight a good squirt of engine oil in a proper oil can .DO NOT USE THAT SPRAY FISH OIL STUFF ,wd40
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