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2010Blackdefender90

Member Since: 07 Jan 2018
Location: London
Posts: 562

2011 Defender 90 Puma 2.4 SVX Station Wagon Santorini Black

Dead battery

This am, pressed the open button on the key fob, nothing, looked into the cab, red alarm light out.

Got in using the key. Everything dead, lights won’t go on, clocked stopped. Volt meter 0.00, so, dead.

Think I know what drained it, hooked the rear view mirror monitor / dashcam to a 12v direct feed to the battery.... doh! battery less than a year old.

Stuck the ctek charger on it.... strange things happening, DRL’s are flashing and so is the lheadlight dash light when I tried it, can hear a clicking in sync with the flights flashing while charging, assuming that this is the alarm signal but with zero power in the battery to fire it?

Going to leave it overnight to trickle charge and see what happens.

Few questions, when the battery comes up to charge, if is does, will the alarm sound? If so, don’t want to leave it over night because it’s bound to go off at 3am and wake everyone up...

Thoughts anyone? Dead drained battery. Car locked fine Monday night, all flashed as required.

29th Nov 2018 4:04pm

Cupboard

Member Since: 21 Mar 2014
Location: Suffolk
Posts: 2971

2011 Defender 110 Puma 2.4 HT Corris Grey

Most DRLs are controlled with a voltage sensitive controller so they're detecting the battery charging and think that the engine is running. That's to be expected.

Just to be sure that the sidelights aren't on too?

29th Nov 2018 4:09pm

2010Blackdefender90

Member Since: 07 Jan 2018
Location: London
Posts: 562

Thanks, think it will take overnight to get a charge into the battery, if it won’t take a charge, then a new battery will be next

29th Nov 2018 4:14pm

Caterham

Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6318

2011 Defender 110 Puma 2.4 XS CSW Stornoway Grey

I assume it's the original battery?

just changed mine to a silver Yasa (or something like that from Halfords).
seem alright but not started the engine since so can't be sure - looks nice though

29th Nov 2018 4:21pm

2010Blackdefender90

Member Since: 07 Jan 2018
Location: London
Posts: 562

Nope, I changed the original last year to the same as you have, as that was dead, after 6 years.

29th Nov 2018 4:29pm

rallysteve

Member Since: 10 Feb 2014
Location: Cumbria
Posts: 2238

2002 Defender 110 Td5 DCPU Keswick Green

The Ctek might not be able to charge a battery from totally dead. Does it have a boost mode or anything?

You might find you are better off jump starting the vehicle first to get a bit of charge into the battery before charging with the Ctek.

Steve 02' 110 TD5 Double Cab Rebuild Thread

29th Nov 2018 4:33pm

2010Blackdefender90

Member Since: 07 Jan 2018
Location: London
Posts: 562

Ctek has a boost mode... got that on. any ideas why the alarm hasn’t sounded as it’s gone dead.... curious how that works. Now I’ve opened it with the key, when it comes back to a decent charge is the system, won’t the alarm sound, as the doors have been opened, but the system would not know or have been reset.

29th Nov 2018 5:21pm

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 8171

2011 Defender 110 Puma 2.4 USW Stornoway Grey

Have you disconnected camera live feed too? Cheers

James
110 2010 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop

29th Nov 2018 7:56pm

OJ

Member Since: 23 Nov 2018
Location: North of Edinburgh
Posts: 121

2015 Defender 90 Puma 2.2 XS CSW Corris Grey

2010Blackdefender90 wrote:
Ctek has a boost mode... got that on. any ideas why the alarm hasn’t sounded as it’s gone dead.... curious how that works. Now I’ve opened it with the key, when it comes back to a decent charge is the system, won’t the alarm sound, as the doors have been opened, but the system would not know or have been reset.

If you opened it with the key fob it will most likely have reset the alarm, if the battery has drained completely i would think everything will have reverted to stored fail safe settings

29th Nov 2018 8:08pm

2010Blackdefender90

Member Since: 07 Jan 2018
Location: London
Posts: 562

jst wrote:
Have you disconnected camera live feed too?

Yep

29th Nov 2018 9:20pm

2010Blackdefender90

Member Since: 07 Jan 2018
Location: London
Posts: 562

OJ wrote:
2010Blackdefender90 wrote:
Ctek has a boost mode... got that on. any ideas why the alarm hasn’t sounded as it’s gone dead.... curious how that works. Now I’ve opened it with the key, when it comes back to a decent charge is the system, won’t the alarm sound, as the doors have been opened, but the system would not know or have been reset.

If you opened it with the key fob it will most likely have reset the alarm, if the battery has drained completely i would think everything will have reverted to stored fail safe settings

CTEK won’t put any charge into the battery, going to try and jump it tomorrow, failing that, new battery.

29th Nov 2018 9:21pm

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 8171

get an airflow battery conditioner on the old one if it comes out. that will bring it back to life. in my experience, despite being shot down here before they are far better than any CTek i have used. i currently have 3 not working CTeks and run 5 of these Airflows, the oldest few must be 10yrs+ and still going strong. https://www.airflow-uk.co.uk/product/battery-conditioner/ Cheers

James
110 2010 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop

29th Nov 2018 9:24pm

2010Blackdefender90

Member Since: 07 Jan 2018
Location: London
Posts: 562

29th Nov 2018 9:25pm

OJ

Member Since: 23 Nov 2018
Location: North of Edinburgh
Posts: 121

jst wrote:
get an airflow battery conditioner on the old one if it comes out. that will bring it back to life. in my experience, despite being shot down here before they are far better than any CTek i have used. i currently have 3 not working CTeks and run 5 of these Airflows, the oldest few must be 10yrs+ and still going strong. https://www.airflow-uk.co.uk/product/battery-conditioner/

Good tip James and at a much lower cost than the CTEK

30th Nov 2018 11:15am

kmac

Member Since: 07 Oct 2009
Location: Middlesex
Posts: 1311

2009 Defender 110 Puma 2.4 USW Santorini Black

2010Blackdefender90 wrote:
Ctek has a boost mode... got that on. any ideas why the alarm hasn’t sounded as it’s gone dead.... curious how that works

Have you got a battery back up alarm sounder?
If yes, should have gone off unless the alarm sounder battery is also dead

30th Nov 2018 11:20am

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