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Home > Technical > Consequences of battery disconnection |
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jules Member Since: 13 Dec 2007 Location: The Wilds of Warwickshire Posts: 4998 |
Very odd. I put in a new battery and there were no issues at all. How long was the car without power?
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19th Mar 2020 7:38 am |
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SYFL2 Member Since: 16 Jun 2012 Location: Sheffield Posts: 2594 |
I would hard reset it and see what happens. |
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19th Mar 2020 8:02 am |
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dorsetfreelander Member Since: 20 Jul 2013 Location: Dorset Posts: 4354 |
Silly question but have you measured the actual battery voltage in situ ? Presumably there was a good reason for removing the battery in the first place. 3 x FL1 2 manual + 1 auto 5 x FL2 4 manual + 1 auto Now Discovery Sport P250 MHEV SE |
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19th Mar 2020 11:14 am |
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flybd5 Member Since: 14 Jan 2020 Location: Massachusetts Posts: 51 |
I said disconnected, not removed. It was disconnected because I wanted to attach a float charger overnight. I had not done so since I bought the car. The battery voltage is correct (before and after). Already tried a hard reset (disconnect again, jumper the two battery cables together, wait a few minutes, reconnect again) and that did not work. that is what caused the fault in the first place. 2008 US LR2 SE, 6-cyl gas |
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19th Mar 2020 1:27 pm |
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Mowog Member Since: 11 Apr 2018 Location: Cheshire Posts: 503 |
Just drive it for 10 miles? |
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19th Mar 2020 2:07 pm |
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flybd5 Member Since: 14 Jan 2020 Location: Massachusetts Posts: 51 |
Did that too... 2008 US LR2 SE, 6-cyl gas |
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19th Mar 2020 2:08 pm |
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Mowog Member Since: 11 Apr 2018 Location: Cheshire Posts: 503 |
Both leads off
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19th Mar 2020 2:14 pm |
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flybd5 Member Since: 14 Jan 2020 Location: Massachusetts Posts: 51 |
Hmm. TPMS, SRS and Key Handset all come into the main computer on the same connector. A clue, Sherlock. I think the connector got dislodged somehow. Will check tomorrow AM. 2008 US LR2 SE, 6-cyl gas |
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20th Mar 2020 12:52 am |
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LR2hselux Member Since: 23 Nov 2017 Location: Norfolk Posts: 48 |
Will leave you to it, you seem to know what you're doing, i don't know why you asked |
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20th Mar 2020 9:15 am |
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flybd5 Member Since: 14 Jan 2020 Location: Massachusetts Posts: 51 |
Considering you have never contributed anything to this thread, I see no reason to explain anything that you. 2008 US LR2 SE, 6-cyl gas |
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20th Mar 2020 8:45 pm |
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Lightwater Member Since: 21 Aug 2014 Location: Sydney Northern Beaches Posts: 4906 |
You do not need to disconnect the battery to charge it. If you do disconnect the battery, & I have done it a handful of times of varying duration while working on the car. The only thing that needed fixing was the time on the clock.
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20th Mar 2020 9:28 pm |
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LR2hselux Member Since: 23 Nov 2017 Location: Norfolk Posts: 48 |
Just for your information LR do not recommend joining the battery terminals together anymore to carry out a hard reset, correct procedure is just to disconnect the battery and leave disconnected for 20 minutes. |
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20th Mar 2020 9:45 pm |
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flybd5 Member Since: 14 Jan 2020 Location: Massachusetts Posts: 51 |
The only time before that when I tried to charge the battery, something was wrong with the system after disconnecting the charger (without disconnecting the battery terminals). The car was idling horribly rough for a few minutes. I tried starting and restarting. It wouldn't help, so I went to do something else. When I came back some 20 minutes later it had settled down. This time it didn't do that when I reconnected the terminals. Maybe this car is possessed. Who knows. I don't how old the battery is, but it holds a good charge and tests correctly. The battery in the key handset is maybe two months old, that I replaced myself and had been working perfectly. 2008 US LR2 SE, 6-cyl gas |
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20th Mar 2020 10:53 pm |
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flybd5 Member Since: 14 Jan 2020 Location: Massachusetts Posts: 51 |
One other symptom is that when I disconnect the terminals (neg first, then pos) and then reconnect them (pos, then neg) when I touch the neg to the battery there is a spark, not very big, but it's there, with a tiny bit of smoke. That was unexpected. 2008 US LR2 SE, 6-cyl gas |
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20th Mar 2020 10:57 pm |
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