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Central locking system not working

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.
1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

Central locking system not working

Postby gtg737m » 15 Nov 2006, 00:59

My doors are not locking automatically when I try to lock my doors from the driver door. This happened suddenly, not sure if disconnecting the battery for a few minutes will solve the problem. Is there a fuse involved with this? Any help will be greatly appreciated. I have a 1994 Volvo 850 Turbo wagon. It sucks that my fuel door is locked and my back door is unlocked. Thanks.
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Postby Ozark Lee » 15 Nov 2006, 01:54

My understanding of the central locking system on the wagons is that the rear liftgate lock is the centerpiece of the system and that a problem there will cause everything else to behave abnormally.

That said, MIJ always suggests turning the key to the lock position, twice, in fairly rapid succession, in the drivers door to do a system reset. I would guess that unhooking the battery would accomplish the same thing but a couple of clicks with the key is way easier.

Let us know if anything you do works,

...Lee
'94 850 N/A
'96 850 N/A
'96 Platinum Edition Turbo
'98 S70 T5
'99 V70XC - RIP Killed by a drunk driver.
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Postby gtg737m » 15 Nov 2006, 03:30

Disconnecting the battery or turning the key twice rapidly on the driver's door didn't work. I'm planning on doing more research on this tomorrow. I was able to unlock the fuel door by pulling a rod connected to the switch that unlocks the fuel door. I'll let everyone know my findings on this.
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Postby alistair » 15 Nov 2006, 04:28

I had a similar problem recently. I was able to get all the locks in the open position again, and then everything worked from the tailgate lock. I didn't touch the door locks again until I had the autoelectrician look at them.

He fixed them in under half an hour. When I posted about my difficultly, someone noted that the rear doors and front doors are on separate circuits for the central locking.

I'd try getting all the locks in the same position and locking/unlocking from the tailgate until you can get the front doors fixed.
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Postby gtg737m » 15 Nov 2006, 14:47

The problem was fuse #6. In the fuse box under the hood it clearly says what fuse corresponds to a specific system. There's a tool to remove the fuse and there's extra fuses located in the box. Thanks for all the replys.
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