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If the generator spins when voltage is applied, the brushes are making contact.
(That is what makes it spin)
If it were mine I'd pull the generator and take the brush cover off and see
what it looks like in there. The problems I've encountered with generators
include worn brushes, brush wires shorted against something (rare but possible)
and field windings coming apart and getting in contact with rotating parts.
If you catch them before much damage is done you can repair them and re-wrap
with glass electrical tape and they are good forever. One other problem is
deterioration of the fiber insulators where the electrical connection screws
go through the shell of the generator.
Another thing that will give false amp lights is electrical problems on the
circuit that includes the amp light. Biggest problem area here is poor fuse
connection and turn signal problems. Since it seems that the charge is not
getting to the battery, I'd look also at the wiring from the generator to the
amp light. If it is shorted it would also light the light and possibly keep
the gen from charging.
--
George Downs, The "original" Walrus3, Bartlesville, Oklahoma
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