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Old 07-30-2021, 01:25 PM   #5
rotorwrench
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Join Date: Jun 2010
Location: San Antonio, Texas
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Default Re: Generator light coming on

The warning light indicates that the control unit is not allowing the generator on line. Residual magnetism in the field poles is enough to generate the current to close the cut out pole contractors and bring it on line. Flashing the field will restore magnetic gauss to the field pole shoes at the proper polarity.

The warning light gets power from the ignition switch. The ground comes through the armature pole terminal when the cut out contactors are still open. As soon as the generator comes on line the ground path for the warning light opens causing the light to go out. If it remains on at all then there is either not enough current being generated or the cut out is still open for some other reason.
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