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 - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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