pulled fuses, got some voltages, next step?

[pasquale pilato]

Good morning,
I've been chasing a battery drain problem I've been
having on my 1990 100q.  With a test light I pulled
fuses, the light never went out, but the fuse that
controls radio, interior lights, and other small
interior features went dim.  I think that is because
things like clock and radio memory is always on, but
please correct me if that is wrong.

I measured some voltages and a resistance, 

Across the battery w/ car running          about 14v
Across the battery w/ car off                    12v
For fun, portable battery used to start the car  13v
Resistance from alternator to + battery post     1 ohm

This is the part I do not understand, my HVAC control
turned voltmeter says 12.0 no matter what.  Radio (660
watts) on, seat heater on, lights on, car on, or all
of the above off.

It looks like the battery is shot, even though it is 3
months old, Sears "international" special.  Since it
is under warranty I think I'm going to return it and
use that towards the Optima batteries Sears now sells.
 But before I do that I would like to understand the
12.0v reading on the HVAC control, which does not
match the volt gage.  

I'm looking for the next move.
Thanks for the help
Pasquale

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