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Subject:Re: blower fan and wipers not working after aux. battery installation
From:Loren Busch
Date:Wed, 9 Dec 2009 08:50:24 -0800
On Wed, Dec 9, 2009 at 8:37 AM, Mike South <msouth@gmail.com> wrote:

>
> It's 26 degrees Fahrenheit today.  The voltage across the posts of the
> starter battery was 12.18 cold.  Immediately after I started it, while it
> was running, it measured 11.51 volts..
>

With the engine running you should be seeing a minimum of about 13.8 volts
at the terminals of the starting battery.  Those reading would indicate that
your alternator is not putting out.