battery drain

[Grant Lenahan]

There should always be a draw, even if it is tiny.

1. you do insert the leads in series
2. in general, DVMs require you to move one lead to a different  
socket for current measurements
3. there is a fuse, typically, at least on the lower settings

Grant
On Apr 5, 2009, at 8:32 PM, Kent McLean wrote:

> To troubleshoot a battery drain, I charged up the battery in my
> '91 200 20V.  I reinstalled the battery. I attached the negative
> (ground) cable to the battery negative and left the positive cable
> free. I then attached my digital volt meter (DVM) probes between
> the battery positive and the positive cable, to see what the
> battery drain might be.  I tried all 3 m.amp settings (2000u,
> 200m, and 20m) and couldn't get a reading -- the DVM showed 0 on
> all 3 settings.
>
> Not being an EE, am I doing this right?
> Should I see a reading?
> Could I have burnt out the m.amp reading?
>
> I swapped the DVM probes for m.amps rather than the Ohms position
> they had been in.  The voltage part of the DVM still works.
>
> -- 
> Kent McLean
> 1999 A4 Avant, V6 Tiptronic
> 1991 200 TQA #3, with mods
> soon-to-be-mine 1990 V8 w/5-speed and other mods
> gone: '91 200 TQA x2, '94 100 S Avant, '89 200 TQ
>
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Grant Lenahan
glenahan at vfemail.net
(201) 602-4702 mobile