[Bob Kontak]

I don't understand how the light would go out.

I am not arguing, fighting, being condescending or an a-hole or nuttin like that.

In my wee brain I picture the negative cable removed from the negative terminal. A simple test light connects the cable to the terminal. The light is on because volts/amps are going through the test light.

I can't see a parasitic draw causing the current to cease flowing.

However, I have never tested draw in this manner. Always with the fused part of a MM.