The wire going to the coil from the resistor should attach to the same polarity sign that it is. Thus if positive is hot, the wire connects to the positive terminal of the coil. The negative side attaches to the distributor/points/condenser, (which is negative on a negative ground) The wire from the alt big terminal attaches to the load side of the amp meter. I say this because the amp meter manufacturers do not mark them clearly, and they can be used for either polarity. Assessment of Amp meter: The supply side comes from the battery non grounded terminal (usually from a heavy #10 wire going to the starter switch big terminal which is connected to the hot battery cable). The load side of the gauge is connected to the light switch, the Voltage regulator (on a generator based system) or the big terminal of alternator (your case), and to the ignition button/switch/key.
If the lights work, and are attached to the load side of the amp meter, turn them on with the tractor off. If the meter swings left, to Discharge, it is correct. If it swings to the right, it is on backwards and just switch all the wires from one terminal to the other. This will make it read correctly. If the lights do not work, watching the Amp Gauge carefully while turning on and off the ignition will also show the meter moving to the left (discharge) when on. Good luck, and keep us informed with a new topic. JimN
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