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Old April 29th, 2014, 04:09 PM   #29
Motofool
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Name: Hernan
Location: Florida
Join Date: Mar 2011

Motorcycle(s): 2007 Ninja 250

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Quote:
Originally Posted by mrudich View Post
I watched the video, and correct me if I'm wrong, but isn't that only to find out where a parasitic draw is coming from? And my battery is in fine condition. Also when I connect the multimeter to the battery in the same setup the reading is just 0.00.
Yes a slow drain is basically the same thing than a short.
The difference is in the intensity of the flow of electrons, which we know as Amperes.

The Ohms are the measurement of the difficulty that that flow of electrons "feels" since they leave the + post of the battery until they return to the - pole.

Then Amperes = Volts / Ohms

Volts are always around 12 in your bike.

Your 30 A fuse melted because it was part of the path of the electrons between + and -.
How much resistance those electrons felt?

Let's say that 40 Amperes melted that poor devil (the 30 A fuse).

Then, the resistance was less than Volts / Amperes.

Resistance < 12 volts / 40 Amps = 0.30 Ohms

A slow drain is in the order of 0.01 Amps.
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