Join Date: Sep 2012
Location: Central Valley, California
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Well, I dont have a 58 volt ficm but I dont see why you should have different voltage during buzz. Have you watched the ficm power and logic power at the same time, also how about at different speeds and operating temps.
If I had to take a shot I would say your ficm has a issue, and the fact you have been down on batteries it may have raised problems with ficm.
Do you have a way to check volts and amps for your charging system.
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