Basic (stupid?)Electrical Question

[Forhan, Thomas]

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I must be missing some basic concept, but here goes:

I'm trying to locate an electrical "leak": new battery goes dead after a
week or so of sitting.

With ignition off and all interior light switches in the off position, I
disconnected the battery at the ground and found -after charging- 13 volts
between the ground terminal of the battery and the ground strap. So I figure
there must be a completed circuit someplace.  I then removed and replaced
all the fuses, one by one, expecting that when I pulled the one on the
guilty circuit, the multimeter would drop to zero. It never did -including
the one fuse on the knee bolster aux relay board. It just continued to read
13 volts.

Can anyone point me in the right direction?

Please copy me at the adress above if you respond. I am on "no mail" and
usually read off the web, but I'm out in the garage with my blackberry.

Thanks

Tom Forhan
91 200q20v Avant, almost ready to sell...

Thomas Forhan