[urq] Battery drain

j.koenig koenigj at comcast.net
Sat Aug 21 14:57:45 PDT 2010


That's useful testing method, but of course it will only help you identify problems that 
are occurring between the fusebox and the consumer.  Not a horrible first step, though. 
FWIW
John

----- Original Message ----- 
From: <dgraber460 at aol.com>
To: <urq at audifans.com>; <quattro at audifans.com>
Sent: Saturday, August 21, 2010 5:19 PM
Subject: [urq] Battery drain



Well one of my worst nightmares has apparently come to pass.
My battery goes flat after ~ 12 hours. I had the battery checked this morning and they 
said it needed a charge but was not the problem. I'm not totally convinced by their 
testing method, but whatever.
I remember seeing a post about taking the battery post off, and checking the power drain 
across the post and cable with a DVM with everything turned off, then pulling fuses 1 at a 
time till you find the culprit. Is this the method of choice? Am I right that you measure 
across the disconnected cable and the post for voltage drain? What is considered normal 
here for clock, ecu, radio, and misc "maintenance".
I'm seeing 11.7 volts across here which tells me something is _way_ wrong and not a small 
short to ground. More like leaving the lights on all day?
Dang - I _hate_ electrical short issues!! I would rather have a mouth full of root canals 
than deal with this!!
Patient is an 83 URQ with a 3B motor transplant.
Help!!

Dennis Graber
720-838-0558 



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