[quote=demon]
You can't check voltage drain like that. The minute you put the leads on the post and cable it completed the circuit through the light bulb. It'll read 12 volts too if you use a meter hooked up that way. You need to check for amps.
I disagree, in a non automotive situation try to get a bulb to light when its connected negative to negative.
In the case above think of the bulb as acting like an amp meter as it will illuminate as a current flows through it. It is connecting to positive though the device that is using the current.
