[old_master]

To check for draw on a battery, a quick and easy way to determine which circuit is at fault, try the following procedure: Disconnect the negative battery cable at the battery. Connect the alligator clip of a 12 volt test light to the negative battery post and the other end of the test light to the negative battery cable. With a fully charged battery: If the test light comes on dim, it is indicating normal parasitic draw, (KAM or keep alive memories). If the test light comes on full brightness, you have a 12 volt draw that can drain the battery rapidly. Start pulling fuses one by one until the light either goes dim or out completely. Now you know what circuit to trace. If you're not sure if the test light is at full brightness, open a door, blow the horn etc... something to create a known draw on the battery. If the light doesn’t get brighter, something else is trying to draw current from the battery. I might add that during your test, make sure ALL lights, accessories, and the ignition switch are off, and the doors are closed, or at least hold the pillar switch in, or disable it. NOTE: This test can be done more acurately with a multimeter that has amperage testing capabilities, connected in the same manner as described above. Rule of thumb is anything more than approximately .2 amps will kill a good battery overnight. Your neighborhood dealer will have the normal parasitic draw specifications for your vehicle, whether they give them to you is another story.