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DISCO3.CO.UK > Technical (D3)

Parasitic battery drain - clamp meter recommendations ?
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10485

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Sounds like alternator to me.

90mA not too bad for electronics.  
Post #224615011th Aug 2021 10:10 pm
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 4871

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

ckra1000 wrote:
So following Robbie excellent guide I have the following results.

Once all switched off, doors locked, bonnet switch shorted out and I rested it for 60 mins ...

... the main positive lead from the battery to the BJB reads 1.25 Amps
... the positive lead from the battery to the alternator reads 1.14 Amps.

Alternator (new Denso unit fitted Nov 2017) sounds like diode(s) have gone ?

Still a difference of 1.25 - 1.14 = 0.09 Amps, so perhaps I have a secondary leak ?


Maybe you're close so to pinning it down, unusual though for a Denso to fail so soon.

Stranger things have happened but it wouldn't break the bank if you were wrong! Thumbs Up yµ (idµ - eAµ) ψ=mψ

  
Post #224616611th Aug 2021 11:56 pm
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aja4x4
 


Member Since: 14 Apr 2019
Location: Westbury
Posts: 2462

United Kingdom 2005 Discovery 3 TDV6 SE Auto Zambezi SilverDiscovery 3

If you are using a clamp meter did you zero the readings first? Andrew

D3 2.7tdv6 2005
D4 3.0 SDV6 Commercial died and gone to LR heaven
D5 3.0 SDV6 HSE  
Post #224617512th Aug 2021 6:16 am
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ckra1000
 


Member Since: 16 Aug 2010
Location: Sheffield
Posts: 165

United Kingdom 2009 Discovery 3 TDV6 GS Auto Zermatt SilverDiscovery 3

Yes, I made sure I set the clamp to zero each time I took a reading.

I'm going to try a diode test on the alternator with my MultuMeter next. Chris  
Post #224628812th Aug 2021 7:56 pm
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