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Author Topic: Battery Drain  (Read 6201 times)

Offline DannyBoyR32

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Battery Drain
« on: 29 October 2010, 15:28 »
So I had my battery replaced last year because it kept going flat. I was told various things but basically that something was draining it.

So one year later, same problem, VW are saying the battery is fine but that I need to ensure I use the car regular, say every two days.

Does anybody know what to do? I am a bit scared it will happen again.  :embarassed:
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Offline Jimp

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Re: Battery Drain
« Reply #1 on: 29 October 2010, 15:45 »
Do you have an aftermarket head unit? Sometimes they can drain the battery if there is a wiring mistake.
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Offline blinkers

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Re: Battery Drain
« Reply #2 on: 29 October 2010, 16:27 »
If you have also upgraded to a higher spec OEM radio, without the proper software coding, this can also drain the battery...i.e. From RCD 300 to RCD 500 etc.
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Offline farmerpalmer

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Re: Battery Drain
« Reply #3 on: 30 October 2010, 08:59 »
As others have said. battery drain is a known problem if you have upgraded to a RCD510.
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Offline DaveN

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Re: Battery Drain
« Reply #4 on: 02 November 2010, 09:45 »
I had a fault with the light in the glovebox, it had blown but was draining the battery. Replaced the light and the battery drain didn't happen again.

Check to see if the light is gone, I initially disconnected it and things improved.
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Offline DannyBoyR32

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Re: Battery Drain
« Reply #5 on: 08 November 2010, 12:35 »
I think I do have the upgraded radio. It has Sat Nav on there etc...........they did say sometimes the radio turns itself on somehow!! Anyway, the annoying thing is how the hell can a car just be drained of battery? It's ridiculous!! Anyway, they fixed it for free and offered to do a week long drain test but there are definitely no lights on in the car as I've had them all switched off and I don't use any of them..............

What I am thinking is what is the best way to actually fix the problem long term as it's annoying to get in your car and find it doesn't start and invariably it's the times when I really need it : - (
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Offline bobotheclown

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Re: Battery Drain
« Reply #6 on: 23 November 2010, 10:00 »
Early GTI's can experience battery drain with the RNS510

http://www.my-gti.com/1101
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Offline pluslyn

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Re: Battery Drain
« Reply #7 on: 23 November 2010, 17:41 »
When I fitted a RCD510 for RCD310 I had battery drain.

The new radio was draining at about 0.080 amp instead of 0.005 amps.

I fitted a ON/OFF switch in line with fuse at the rear of the radio. This was a temp. fix.

I have now replaced the Can Gateway with the latest version and had to Recode it with VCDS.

If you want any more help let me know.
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Offline AlanD

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Re: Battery Drain
« Reply #8 on: 23 November 2010, 18:39 »
Quote from: pluslyn on 23 November 2010, 17:41
I have now replaced the Can Gateway with the latest version and had to Recode it with VCDS.

Yep, what he said. If you have retro fitted to a later version and you have an early model you may experience battery drain. This is the way to fix it (and isnt always cheap if you dont have the software or know how).
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Offline mat2536

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Re: Battery Drain
« Reply #9 on: 01 January 2011, 21:35 »
AlanD, what do you mean by 'earlier model'.  I've got an 08 plate golf and looking to upgrade to the RCD510.  Would this need the extra wiring etc??

Many thanks mate

Mat
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