Member Since: 23 Dec 2015
Location: Bangor
Posts: 19
battery keeps draining
Hi all, my 2005 2.7TDV battery works just fine most of the time and the car starts really quickly with not a lot of cranking required, but every so often I will go to the car and find the battery to be totally dead, not even enough power to unlock the doors! If I swap the battery over the car starts easily with no issues and so I leave that battery on for a while until the same thing happens. The car isn't my daily driver and is used mainly for short trips, but I will be leaving it parked up for a couple of weeks at an airport car park soon and don't really fancy having to swap batteries over on my return to the car, so I was thinking about fitting a battery isolator to stop any potential drain whilst I am away. I'd welcome any suggestions or advice group members can offer. Thanks in advance. Thumbs Up ps I am using a new battery.
6th Nov 2016 10:52 am
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73131
Original battery? Might just need a new battery, cheap as chips in the grand scheme of running a D3.
Oops ignore that, didn't see new battery. Alternator might be goosed. We need voltage numbers, both running and engine off.
6th Nov 2016 10:56 am
unwaith
Member Since: 23 Dec 2015
Location: Bangor
Posts: 19
The battery is giving a reading of 12.6V with engine off and 15.03V with the engine running.
6th Nov 2016 1:08 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73131
See what the battery is in the morning tomorrow, then the surface charge will have dissipated and give you a true figure. 15.03 is normal for the alternator if charging a battery that's needing a lot of topping up, it should then drop down to 14.2v or so after a while. Re battery voltage, best to see what it is tomorrow.
6th Nov 2016 4:39 pm
unwaith
Member Since: 23 Dec 2015
Location: Bangor
Posts: 19
Thanks for that, I'll check the battery again in the morning
6th Nov 2016 7:27 pm
unwaith
Member Since: 23 Dec 2015
Location: Bangor
Posts: 19
Battery voltage measured this morning was 12.4V after a cold night.
7th Nov 2016 8:23 am
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73131
Not too bad then.
7th Nov 2016 8:27 am
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
Of course, voltage is only indicative of the state of charge.
An unexpected drain is usually understood as a good battery state after a few days but declining further over multiple days.Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 23 Dec 2015
Location: Bangor
Posts: 19
down t under 11V this morning - going to charge it up again now then take it to an auto-sparks to check it out & hope they find a problem with the battery!
8th Nov 2016 9:36 am
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
Did you read my guide?Land Rover - Turning Drivers into Mechanics Since 1948
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
down t under 11V this morning - going to charge it up again now then take it to an auto-sparks to check it out & hope they find a problem with the battery!
