My car battery drained itself after a week of not being used. I was researching how to identify the cause, and saw a comment [under this article](http://www.wikihow.com/Find-a-Parasitic-Battery-Drain) saying:

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> **What if I am not detecting a reading but the battery still drains?**
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> 
> You could have a fuse that is draining your battery. 
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> *[Not Helpful **5**] [Helpful **7**]*
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> 
> 

This sounds like my situation - there's not much drain, but I've had heaps of problems with the fuses (a previous owner "fixed" blown fuses by wrapping copper wire around them, which in one case fell apart inside the fuse box... ugh!)

But I don't understand how a fuse could cause drain like this, or, if I can't measure such drain the normal way, how I could identify that this is the problem and how I could fix it.

Can someone elaborate? What you do if you had a car (97 Toyota RAV4) with no draining electrics, a relatively new battery (six months), high temperature all year, seemed to have a normal level of amp draw when off, but a historically dodgy fusebox and a self-draining battery?