Ammeters come with their own special considerations.
You need to connect the ammeter up correctly. It's not like a voltmeter where you touch the + and - and take a reading. You have to connect the ammeter IN SERIES with the load to read the current. That is + battery to + coil, - coil to + ammeter, - ammeter to - battery.
The ammeters built into your average multimeter, cheap or expensive, are limited to 10A loads for no more than 10 seconds. Beyond that you risk overheating the meter and causing damage.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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