[asphaltgambler]

You must use a multimeter, set to low amps scale, in series with either positive or negative post / cable end. The car needs @15 mins after shutdown and locked to go to sleep. So you'll need to find the front hood light switch and close it. It may be in the latch mechanism.

Then disconnect either lead, connect your meter. It should not exceed 50 miliamps. Actually that car may be closer to 35 miliamps maximum. If the draw is within these limits, it's your battery. Using a test light to check for draw is misleading as it takes only a few miliamps to light the bulb brightly.

Lastly if you suspect a bad diode in the alternator, check for A/C voltage bleed when it's running by connecting your multimeter across the +/- posts with the scale set to A/C. Any reading of A/C voltage is confirmation of a bad diode / triode bridge.