Quote:
Originally Posted by CADplans
Disconnect one of the battery cables.
Connect a 12V light bulb (like a tail light bulb) between the cable and the battery post.
If something is draining the battery the light bulb will light up.
When you find the problem, the light bulb will go out.
If the bulb does not light up, the battery is bad.
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Good advice but the bulb will light only with enough current draw... It would be a good experiment to discover what current will actually develop any light from the bulb (it would depend largely on the bulb selection). I don't know if a 200mA (~2.5w) drain would actually light the filament...but it would eventually drain the battery, for example.
Meters are SO cheap these days, they're almost as indispensable as PBblaster... :-)
John