As John T and Bob M indicate it is the ability to pass some 200 Plus MA on the wire that counts. To do it place the 10 ohm resistor in the wire. (the charging system will work as is this way. To see a LEd indicator light on the panel, measure the volts across the 10 ohm resistor with the key on and tractor not running. This dropped voltage will be what your LED will see if hooked across it Use appropriate resistance to keep it below its max operating voltage. When the tractor is stopped, the alternator terminal is electronically ground. Lighting the light when 12v is placed on it by turning on the ignition. When it is effectively excited, the regulator internal to the Alt. puts charging voltage on that terminal (~14volts are now on both sides of the bulb, or resistor) no flow, alternator runs and will continue to do so until its output goes to zero when stopped. Then the #1 terminal goes to ground again.
If the resistor is not used, (or a diode is used and installed backwards) the 14 volts of the alternator will back feed the ignition switch, making the ignition stay on, not letting it shut off. Thus the resistor/lamp/diode. is needed. JimN
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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