s10 buzzing under dash, wont start

I tried to start my s*** 10 to day and i got nothing like the batt was dead, but there is a buzzing coming from under the dash from what looks like a diagnostic port. The int lights still work and the buzzing still continues with the key out, the only way to stop it is to disconnect the batt. Any ideas?
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Sounds like:
a) a wiring short
b) fouled or burnt fuse
c) faulty fuse panel

What charge does the battery have? Some of them have a warning alarm/dummy alert when the battery has enough to power ACC, but not enough to kick the starter over.