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disco32009
Member Since: 12 Oct 2009
Location: worcestershire
Posts: 295
  
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hi, any one know why the park brake light(orange light)has popped up just because i had a flat battery? it was fine before no faults before flat battery.
also can you disconnect the battery to charge etc?
thanks
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 21st Feb 2010 11:29 pm |
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disco32009
Member Since: 12 Oct 2009
Location: worcestershire
Posts: 295
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any ideas?
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| 22nd Feb 2010 9:47 am |
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Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20732
  
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It may have just stored a low voltage fault. Either charge or replace the battery, and try it again.
You dont have to disconnect the battery to charge it up, but it is advisable to do so  My D3 Build Thread
TDV8 Retrofit Build Thread
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| 22nd Feb 2010 9:53 am |
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J@mes
Member Since: 10 Nov 2008
Location: Bomber County
Posts: 4547
 
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No you don't need to disconnect the battery when you are using a battery conditioner on it!
I'd like to know the reasons behind it being advisable, other than "one person said it so we're all going to say it"
Used my optimate on 4 different vehicles including my D3 without disconnecting the battery, and had no issues. 2014 D4 XS
2005 D3 SE - Gone
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| 22nd Feb 2010 11:47 am |
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mzplcg
Member Since: 23 Jun 2009
Location: Gone
Posts: 1087
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The reasons for disconnecting a battery when charging it are old BUT still valid if you have an old battery charger.
The old chargers (and some cheap new ones) were rectifier based whereas the new ones are switch mode power supplies which can be programmed with some intelligence. The old style were crudely voltage smoothed and had no voltage or current limitations beyond a capacitor really. These would damage the rectifiers in alternators and have even been known to damage sensitive stuff like radios etc.
New chargers like the CTEK are perfectly safe for use when connected to the car though.
HTH
Dom.
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| 22nd Feb 2010 12:04 pm |
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StephenM
Member Since: 21 Jan 2010
Location: North Yorkshire
Posts: 44
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Thanks both Stephen
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| 22nd Feb 2010 12:11 pm |
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disco32009
Member Since: 12 Oct 2009
Location: worcestershire
Posts: 295
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ok many thanks, so is it ok to disconnect the battery to charge then no problems?
many thanks
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| 22nd Feb 2010 6:59 pm |
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disco32009
Member Since: 12 Oct 2009
Location: worcestershire
Posts: 295
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??
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| 22nd Feb 2010 7:54 pm |
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StephenM
Member Since: 21 Jan 2010
Location: North Yorkshire
Posts: 44
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Ok, to recap:
1. If you have an old fashioned or cheap rectifier type of Battery Charger, it is best to disconnect the battery because the voltage fluctuations can damage the sensitive electronic components of the Disco (basically it is more like a computer data centre than a Ford Anglia)
2. If you have a sexy modern battery charger such as the CTEK type then you do not need to disconnect the battery because the charger delivers a smoother, more stable and controlled voltage that will not damage the Disco's sensitive electronics.
Marks out of 10?  Stephen
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| 22nd Feb 2010 11:29 pm |
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