IPD sale XeMODeX - Experts in Volvo Electronics
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy anything with this and it helps MVS!

850 central locking draining battery

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

Covert
Posts: 103
Joined: Sat Jul 30, 2016 11:25 am
Year and Model: 1997 850
Location: Northampton
Has thanked: 0
Been thanked: 0
Great Britain
Covert

850 central locking draining battery

Post by Covert » Mon Aug 22, 2016 4:15 am

first of all thanks to everyone that has answered my posts so far i do appreciate it !

im sure you are all sick of my questions now , (cant promise this will be the last)

on "the list" of things to fix on the 850 is when you use the central locking it puts a drain on the battery so much so that you come back and the cars flat

leave it unlocked and its absolutely fine but its not ideal!

plan was to manually lock the doors and just take the fuse out for the central locking although i would like to get it sorted somehow.

any thoughts very welcome as electrics is not my strong point !
thanks Mark.

User avatar
abscate
MVS Moderator
Posts: 21963
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 363 times
Been thanked: 1109 times
Trinidad & Tobago
abscate

Re: 850 central locking draining battery

Post by abscate » Mon Aug 22, 2016 9:47 am

Ill guess one of the locks is sticking and the motor is straining all the time when you try to lock.

If you lock and then unlock does it still drain?

You probably have to pull the connectors one by one to isolate the bad one.

Ugh.

PS - as long as your handbrake works you are welcome here. Non-working hand brakes need not apply it. :D :D
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary

User avatar
misha
Posts: 4458
Joined: Sun Dec 07, 2008 4:09 pm
Year and Model: '97 850 2.5 20v
Location: Serbia
Has thanked: 59 times
Been thanked: 154 times
Serbia
misha

Re: 850 central locking draining battery

Post by misha » Mon Aug 22, 2016 12:26 pm

Does the car have factory or aftermarket alarm system?
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

scot850
Posts: 6191
Joined: Mon Apr 05, 2010 2:46 pm
Year and Model: 2000 V70 R
Location: Calgary, Alberta, Canada
Has thanked: 18 times
Been thanked: 252 times
Canada
scot850

Re: 850 central locking draining battery

Post by scot850 » Mon Aug 22, 2016 5:30 pm

Following on from misha's question, how long does it take to drain a fully charged battery to point of not starting (say <9.5V).

I have an aftermarket Viper system on my 2000 R and it runs the battery down over a week or so as I don't use the car much, so I have a trickle charger to top the battery up. You can check if it is the alarm system or something else, by doing a current draw test on the battery and pulling each fuse until you find which circuit is draining the system. Then disconnect each item on that circuit until the draw disappears.

Neil.
2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

Covert
Posts: 103
Joined: Sat Jul 30, 2016 11:25 am
Year and Model: 1997 850
Location: Northampton
Has thanked: 0
Been thanked: 0
Great Britain
Covert

Re: 850 central locking draining battery

Post by Covert » Wed Aug 24, 2016 8:01 am

sorry only just seen this , its all standard volvo equipment no add ons
if you park it in the morning and lock it by the time you come out of work in late afternoon it will be flat.
all the central locking works off both the key in the doors and by the remote .

question does everybody elses lock the doors then as an after goes clunk ?

i thought it was one lock but putting my ear to each door it does it on every door , its stays locked doesnt open back up.

tryingbe
Posts: 1892
Joined: Thu Jun 18, 2009 12:43 pm
Year and Model: None
Location: Mesa, AZ, USA
Has thanked: 0
Been thanked: 23 times
United States of America
tryingbe

Re: 850 central locking draining battery

Post by tryingbe » Wed Aug 24, 2016 8:23 am

Sounds like you have a dead battery.
I don't know about England, but I can easily have the battery tested for free at any auto parts store in US.
85 GLH, 367 whp
00 Insight, 72 mpg

Covert
Posts: 103
Joined: Sat Jul 30, 2016 11:25 am
Year and Model: 1997 850
Location: Northampton
Has thanked: 0
Been thanked: 0
Great Britain
Covert

Re: 850 central locking draining battery

Post by Covert » Wed Aug 24, 2016 8:25 am

Battery is fine starts first time every time. only 6 months old

tryingbe
Posts: 1892
Joined: Thu Jun 18, 2009 12:43 pm
Year and Model: None
Location: Mesa, AZ, USA
Has thanked: 0
Been thanked: 23 times
United States of America
tryingbe

Re: 850 central locking draining battery

Post by tryingbe » Wed Aug 24, 2016 1:39 pm

I see you never had a "brand new" part gone bad on you.

Get the battery tested.
85 GLH, 367 whp
00 Insight, 72 mpg

Covert
Posts: 103
Joined: Sat Jul 30, 2016 11:25 am
Year and Model: 1997 850
Location: Northampton
Has thanked: 0
Been thanked: 0
Great Britain
Covert

Re: 850 central locking draining battery

Post by Covert » Wed Aug 24, 2016 1:42 pm

Ahh no just because it's new doesn't mean it's any good but already had it drop tested and it passed fine

beigg
Posts: 691
Joined: Sun Sep 22, 2013 9:07 am
Year and Model: 850 97
Location: Est. Mi
Has thanked: 0
Been thanked: 0
Uruguay
beigg

Re: 850 central locking draining battery

Post by beigg » Wed Aug 24, 2016 5:20 pm

Does the radio retain power on the entire time once the key is removed?
ugh smh 850 Turbo fridge

Post Reply
  • Similar Topics
    Replies
    Views
    Last post