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amazing
Member Since: 05 Mar 2011
Location: chengdu
Posts: 1542
  
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Hi
lots about getting jump starting and not connecting straight to the battery but, What about when giving someone a jump (start) do the same rules apply? It is better to have and not need it then need and not have it.
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 9th Nov 2011 10:22 am |
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jm105845
Member Since: 21 Aug 2007
Location: dublin
Posts: 271
  
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hi
i have jump started straight from battery terminals no issues
regards
jj
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| 9th Nov 2011 10:54 am |
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amazing
Member Since: 05 Mar 2011
Location: chengdu
Posts: 1542
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Ahh but you have the "luck of the Irish " on your side
as only 1/16th Irish I need good management not good luck.. 
I don't want to have any ECU issues It is better to have and not need it then need and not have it.
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| 9th Nov 2011 11:09 am |
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Bodsy
Site Sponsor
Member Since: 06 Nov 2006
Location: In the Clubhouse
Posts: 21361
  
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I've jump started other vehicles from mine before with no problems.
Generally Positive from Battery to Battery, Negative from D3 Battery, to Other Car Ground point.
Connect them up, start the D3 & let it charge the other vehicle for a few minutes. Usually give the revs around 1500 to help the alternator push the power out.
then start the other car & all done. Bodsys Brake Bible
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| 9th Nov 2011 11:14 am |
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jm105845
Member Since: 21 Aug 2007
Location: dublin
Posts: 271
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hi
not sure why it would damage the ECU as long as you connect the jump leads
correctly
i have found that the battery is powerful enough to start the jumped vechicle
without starting the disco
regards
jj
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| 9th Nov 2011 11:26 am |
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nighthawk
Member Since: 24 Jul 2010
Location: Malta
Posts: 1163
 
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I recently jump started my girlfriends car off the aux battery (Optima YT). I connected positive to positive and negative to negative.
Anyone knows why it is recommended to connect negative to an earth point rather than directly to the negative terminal? Dennis
2006 Discovery 3 TDV6 Commercial Manual Buckingham Blue
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| 9th Nov 2011 12:33 pm |
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choppa60
Member Since: 16 Oct 2009
Location: chelsea tractor land ....london
Posts: 904
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for safetys sake i got a portable jump start ,dont want to mess with the car ,will carry mine through the winter months .  2008 ,hse, it does what it says .
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| 9th Nov 2011 1:05 pm |
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big_si
Member Since: 25 May 2010
Location: East Yorkshire
Posts: 90
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nighthawk wrote:Anyone knows why it is recommended to connect negative to an earth point rather than directly to the negative terminal?
I believe it is to keep any potential sparks generated at the dead negative terminal away from the battery when you connect it, (there's apparently a risk of fire/explosion from vapours coming from the battery vents). 
Not sure if it's as important nowadays with maintenance free/sealed ones, but I'm sure there's still a small vent hole on them all.
I understand it's also important to connect jump leads in the right order - to minimise the risk of accidentally shorting them together or against the car body/engine.
There's some useful advice here from the AA http://www.theaa.com/motoring_advice/break...leads.html 2006 D3 S (I use it when I can prise the keys off the wife!)
2009 Astra CDTi SXi ecoflex (I use this when I can't!)
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| 9th Nov 2011 2:31 pm |
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nighthawk
Member Since: 24 Jul 2010
Location: Malta
Posts: 1163
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Ahh thanks for that si. Makes sense really Dennis
2006 Discovery 3 TDV6 Commercial Manual Buckingham Blue
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| 9th Nov 2011 6:50 pm |
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disco4x4au
Member Since: 19 Jan 2006
Location: Perth
Posts: 409
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Unlike the D3, the D4 has a voltage sensor between the earth terminal of the battery and the earthing point, which is why you shouldn't connect anything that draws a largish current directly to the negative terminal. Use the earthing point in front of the battery.
Cheers,
Gordon ex - 2006 D3 TDV6 SE, silver, with lots of stuff - R.I.P.
ex - 2009 D3 TDV6 SE, silver, had lots of stuff too!
Now - 2010 RRS 3.0 TDV6, rimini red, 18" rims + Cooper LTZ, rear eLocker, Spider tuning box, GOE protection plates and rock sliders, GOE 3way shortened rods.
Last edited by disco4x4au on 10th Nov 2011 6:10 am. Edited 1 time in total
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| 10th Nov 2011 2:24 am |
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amazing
Member Since: 05 Mar 2011
Location: chengdu
Posts: 1542
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as Gorodn says "which is why you shouldn't connect anything that draws a largish current directly to the negative terminal. Use the earthing point in front of the battery."
but what about the opposite situation is this including when you jump someone else then? That was my main question. I would have thought it safer to follow this then too? It is better to have and not need it then need and not have it.
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| 10th Nov 2011 3:03 am |
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disco4x4au
Member Since: 19 Jan 2006
Location: Perth
Posts: 409
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amazing wrote:
but what about the opposite situation is this including when you jump someone else then? That was my main question. I would have thought it safer to follow this then too?
Yes, whether your drawing or feeding current to the battery.
Cheers,
Gordon (spelt it right this time!) ex - 2006 D3 TDV6 SE, silver, with lots of stuff - R.I.P.
ex - 2009 D3 TDV6 SE, silver, had lots of stuff too!
Now - 2010 RRS 3.0 TDV6, rimini red, 18" rims + Cooper LTZ, rear eLocker, Spider tuning box, GOE protection plates and rock sliders, GOE 3way shortened rods.
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| 10th Nov 2011 6:11 am |
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amazing
Member Since: 05 Mar 2011
Location: chengdu
Posts: 1542
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Thanks for the clarification
Also thought your name was in secret code to maintain anonymity
amzaing It is better to have and not need it then need and not have it.
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| 10th Nov 2011 6:18 am |
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