Good info. If you still can't find it there might be a drain small enough that it will not make a test light glow. You can also hook up an ammeter between the neg post and neg wire. You should get a reading. Almost all cars draw some milliamps. You can then remove one fuse at a time untill the amp flow falls of. There are some things that always pull milliamps such as the clock. Battries can short internaly too. They can be charged up but will quickly discharge themselves just sitting unconected. This sometimes happens after one has run low on fluid. The plates can curl and get too close to each other. Alt control diodes can go bad and let curent flow backwards. The alt output might still be good when you test using as DC setting on the meter. to test for a bad diode swich to AC and se what if any AC readings you get. If a diode is bad you wil get high AC reads.


In the right hands the cost of the tool matters little in the quaility of the work.

Thanks guys.

Well said.