Flat battery due to radio when car is locked?

[Ashes]

Had a flat battery this morning in the D3. A bit strange but what I think is stranger is what I believe the reason is!

While trying to start it, thought I'd check a few systems so turned it off and locked the doors while in the car. To my surprise the CD player came on.

I suspect that when off, the CD/radio is playing and that is causing the failure.

Any ideas what might be causing this or how to stop this happening?

[Ashes]

Just tried jump starting it but that hasn't worked either. Will have to try the battery charger next. Any issues with connecting both +ve and -ve leads of the charger directly to the battery or should you connect the +ve to the battery and the -ve to the chassis like you would for a jump start?

[Ashes]

Couldn't jump start it from the Falcon but managed to jump start it from the 2nd battery by just connecting the +ve to the +ve. Drove it for 30mins to give it a good charge and started no problems. Drove it home and it won't start again. Lots of faults come up but the main one that stays on the info panel is the HDC fault.

Will let it rest for an hour and try again. Seems it won't even try to turn over if it finds a fault.

If I can get it going, it might need a trip to LR to have a look at it.

[Tombie]

Get the battery checked.......

[sniegy]

Drove it for 30mins to give it a good charge

Ashes,
Driving it for 30mins will not charge the battery at all, will give it a float charge but nothing more.

Sounds like a dead battery. Get it replaced. All the warnings are because of the battery. Some ECU's are not getting comms through correctly on the canbus system so it will lead all sorts of faults.

Cheers.

[Ashes]

I recon you guys are right. Will jump it in the morning and take in into LR in the morning. Hopefully just a quick battery change if they have some in stock.
Alternator should be OK as that was replaced about 12 months ago.

Sneigy, what time does MLR open in the morning?

[sniegy]

07:30, Bright & Early.
Parts open at 08:30.

Cheers

[Ashes]

Had the car checked this morning and it appears it is the 2nd battery causing problems.
It was well below charge and was leaking.
I'm getting this replaced with the yellow top optima.

The primary is fine, just needs a charge up.
What I'm not sure of though is why a fault with the 2nd battery would drain the primary. I have a SC80 traxide fitted and thought
this was designed not to allow the primary to drop below cranking charge. LR suggested that the secondary in trying to charge itself was drawing from the primary. I still suspect I had some gremlin which ran the radio
when the car was off and this was what drained the primary. Possibly the fault with the secondary is a bit of a furphy!

[drivesafe]

Hi Ashes, even if your auxiliary ( secondary ) was totally stuffed and pull your fully charged cranking battery down, it would only take the cranking battery down to 12.0v and then the SC80 would have isolated the cranking battery, leaving you with heaps of power to be able to start the D3.

You can start a D3 with as little as 11.5v in the cranking battery.

I suspect your reasoning is correct and it has been the cranking battery that has pulled the auxiliary battery down, and this is because there was something left on in the D3 which runs off the cranking battery.

Having any part of our sound system on, even just the CD/Radio, the system will pull anything from 10 to 20 amps and this will easily flatten a cranking battery overnight, even with the auxiliary battery supplying additional power via the SC80-LR.

[DiscoWeb]

Had the car checked this morning and it appears it is the 2nd battery causing problems.
It was well below charge and was leaking.
I'm getting this replaced with the yellow top optima.

The primary is fine, just needs a charge up.
What I'm not sure of though is why a fault with the 2nd battery would drain the primary. I have a SC80 traxide fitted and thought
this was designed not to allow the primary to drop below cranking charge. LR suggested that the secondary in trying to charge itself was drawing from the primary. I still suspect I had some gremlin which ran the radio
when the car was off and this was what drained the primary. Possibly the fault with the secondary is a bit of a furphy!

Ashes,

Have a read through this thread

http://www.aulro.com/afvb/d3-d4-rrs/...attery-d4.html

I am sure drivesafe and or others who understand these things intimately will be along soon to advise that the Aux battery will not and can not flatten you cranking battery if installed correctly and LR will try to palm off lots of problems on the the dual battery set up that are not possible.


Regards,

George

P.S looks like drivesafe has already responded !