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15V+? Cause for concern?
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nickbos
 


Member Since: 11 Sep 2018
Location: Cambridgeshire
Posts: 72

United Kingdom 2006 Discovery 3 TDV6 SE Manual Zermatt SilverDiscovery 3
15V+? Cause for concern?

In my recently acquired Disco 3, behind the park brake switch there's an eyesore voltage meter that shows the voltage running through the system. Display is stable until it exceeds 15V after which it flashes constantly - which frankly is a pain. Presumably it's trying to warn me of something?

Question: If the alternator is pushing 15V+ through the system, is this cause for concern?

I'm seriously thinking of having this thing removed, as it's becomming boring ....
  
Post #198257611th Sep 2018 7:30 pm
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kajtzu
 


Member Since: 10 Aug 2017
Location: Helsinki
Posts: 6538

Finland 2005 Discovery 3 4.4 V8 HSE Auto Cairns BlueDiscovery 3

It’s fine if it is supplying 15 volts.
  
Post #198257711th Sep 2018 7:33 pm
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
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Ukraine 

Usually a sign the battery is not that healthy, or really low. Thumbs Up
   
Post #198258911th Sep 2018 7:45 pm
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 8043

England 2014 Discovery 4 3.0 SDV6 HSE Lux Auto Corris GreyDiscovery 4

Thinks writers come, they charge higher in winter Laughing
 It can when others can't,
It will when others won't,
It goes where others don't. 
 
Post #198261611th Sep 2018 8:11 pm
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lynalldiscovery
 


Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274

United Kingdom 2006 Discovery 3 TDV6 Metropolis LE Auto Bonatti GreyDiscovery 3

I do short commutes and for the next 6 months my cig lighter volt gauge will show 15.2/3 volts.
  
Post #198262511th Sep 2018 8:19 pm
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 8043

England 2014 Discovery 4 3.0 SDV6 HSE Lux Auto Corris GreyDiscovery 4

D3s are designed to charge at over 15v in cold weather for the first 10-12 minutes and then drop back to around 14.5v until the battery is fully charged, it could be the after market amp meter is not designed to go over 15v. Thumbs Up
 It can when others can't,
It will when others won't,
It goes where others don't. 
 
Post #198262811th Sep 2018 8:26 pm
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nickbos
 


Member Since: 11 Sep 2018
Location: Cambridgeshire
Posts: 72

United Kingdom 2006 Discovery 3 TDV6 SE Manual Zermatt SilverDiscovery 3

DSL wrote:
Usually a sign the battery is not that healthy, or really low. Thumbs Up


Prior to start up the voltage showing is 10.8-11.0 volts, which seems low for what is suppose to be a new battery. My local indy fitted one to see if the one that came with the vehicle was the cause of the "HTC system fault reporting unavailable" fault. Fault report still there on startup each time, so assume not.
 

Last edited by nickbos on 12th Sep 2018 6:43 am. Edited 1 time in total 
Post #198272512th Sep 2018 6:39 am
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72741

Ukraine 

New battery time. Thumbs Up

PS Oops, didn’t see the new battery bit. Faulty battery would be my WAG. Thumbs Up
   
Post #198272612th Sep 2018 6:41 am
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nickbos
 


Member Since: 11 Sep 2018
Location: Cambridgeshire
Posts: 72

United Kingdom 2006 Discovery 3 TDV6 SE Manual Zermatt SilverDiscovery 3

No, it's the result of a rather iffy second-hand alternator fitted by the previous owner that is pushing out low, and then high, voltages. I dug out the receipt from the paperwork I was handed when I picked the vehicle up, and it shows a twenty-five quid item off of a breaker via Ebay. Having a new Denso fitted, which certainly ain't cheap - around twice the price of an alternator I fitted in my '89 110CSW some years back. Ouch...
  
Post #198319013th Sep 2018 5:43 pm
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 8043

England 2014 Discovery 4 3.0 SDV6 HSE Lux Auto Corris GreyDiscovery 4

Check out site sponsors advancedfactors Webb site before you part with hard earned readies Thumbs Up
 It can when others can't,
It will when others won't,
It goes where others don't. 
 
Post #198326813th Sep 2018 9:27 pm
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