The amount of voltage at the #1 terminal will determine how fast the alternator must turn before it begins to charge.
A diode in line (series) with the light will not make any difference since the light bulb is the resistance that lowers the voltage at the alternator. If you wire the diode in parallel with the light the light will not turn on since the current will flow though the diode rather than the bulb.
You need a minimum of about 6 volts to get the alternator to start at a lower rpm. You can use a resister wired in parallel with the light to increase the voltage available at the #1 terminal. The resistor will however cut down on the brightness of the light.
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Today's Featured Article - Tractor Traction - by Chris Pratt. Our first bout with traction problems came when cultivatin with our Massey-Harris Pony. Up till then, this tractor had been running a corn grinder and pulling a trailer. It had new unfilled rear tires and no wheel weights. The garden was already sprouting when we hooked up the mid-mount shovel cultivators to the Pony. The seed bed was soft enough that the rear end would spin and slowly work its way to the downhill side of the gardens slight incline. From this, we learned our lesson sinc
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