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  #1  
Old May 18th, 2016, 09:04 PM
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Adam
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Battery Issue or Charging Issue?

I have been driving the truck most days and when I get in and turn the key the volt meter is showing about 11V, once started it showing about 13V+...I assume that with it running and getting that voltage the alternator is putting out a good current, but the battery may be on its way out....there were a few times this winter when it had not been used for a few weeks that it dropped too low to start and needed to be jumped...think its the battery?
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  #2  
Old May 18th, 2016, 09:59 PM
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steven
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Hmmm, have you considered dropping in on your local auto parts shop to have the battery tested? - not too long ago, they would always ask that you pull the battery for several hours of bench testing that included a full recharge, but some of them are now doing freebie under-the-hood testing with spendy handheld testing units that only take a few minutes & that also test the alternator. Maybe something to do while you can still drive it over there?
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Old May 18th, 2016, 11:25 PM
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Chris Davis
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Don't trust your gauge. Put a volt meter directly on the battery--and post your results. Mine does that--I need to fix that... I'm going to take a direct line from battery to terminal and see what result I get on my gauge...
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Old May 19th, 2016, 01:03 AM
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Adam
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Good idea...will do...

Quote:
Originally Posted by Davis View Post
Don't trust your gauge. Put a volt meter directly on the battery--and post your results. Mine does that--I need to fix that... I'm going to take a direct line from battery to terminal and see what result I get on my gauge...
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2008 Range Rover HSE L322/MkIII - Gone but not forgotten
1988 D90 County RHD 2.5TD
2015 Porsche Cayenne TD
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  #5  
Old May 19th, 2016, 01:25 PM
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Bill
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Concur with auto parts store recommendation--I just posted a question ( http://www.defendersource.com/forum/...ors-40135.html ) re. a similar issue with a 300TDi--volts on the madman ems (which gets its positive juice from the fuse block and is grounded to the engine, so not true across-the-terminals voltage) were reading as low as 12.8V with headlights and A/C running, usually around 13.4 at highway speeds with no serious juice-drainers on.

Went to Auto Zone and they put one of those testers on it, had me take it to 1500ish RPMs and hold it, monitored voltage during starting, and checked battery amperage with the engine off. They said it was good to go--13.4 no load, 13.2 under load (fan and lights on), all within spec, according to the machine.

So that saved me a couple hundred bucks. I'll just keep an eye on the voltmeter and re-engage if the readings drop at all.
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