Charging system
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Heel & Toe
Joined: Oct 2009
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Charging system
My charging system showed low voltage. I replaced the alternator with a rebuilt one. At highway speeds it puts out 14.2 volts. Sitting in a parade and driving slowly it drops down to 11 volts. Has antone else had this problem?
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Joined: May 2006
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From: SOFLA
2016 Corvette of Year
2015 C6 of Year Finalist
I went through 2 alternators, the third worked fine. A lot of times the rebuilt ones are not done correctly. Also check the negative terminal on your battery, mine was turning black I cut it off and cut back the wire and installed a new connector, which was way better than the stupid factory one anyway. I also had a starter issue, the solenoid had melted, don't think that had anything to do with the charging system issue, but if the ground wire underneath is not connected correctly you can have issues.
Basically check, alternator, battery, connections and grounds. The issue is there.
Basically check, alternator, battery, connections and grounds. The issue is there.
Last edited by mcandrew67; Oct 3, 2018 at 11:06 AM.
Race Director
Joined: Dec 2013
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Start with this since I go over some voltage check point tests, and if have question still on specific area, then can answer them.
https://www.corvetteforum.com/forums...intenance.html
My guess, is that sitting in the parade, and driving slow, you have the A/C on, and the battery is draining down faster that the alternator can charge it back up.
Hence OEM Valeo alternator only puts out about 14 amps when the motor is idling, and the raditor fan when running (ac turns it on) , is drawing close to 16 amps itself isntead.
So to solve this problem, you upgrade to a billet mechman alternator that is 6 pole (factory is only 3 pole) and the billet alternator will put out close to 60amps when the motor is idling instead.
https://www.corvetteforum.com/forums...w-pricing.html
https://www.corvetteforum.com/forums...intenance.html
My guess, is that sitting in the parade, and driving slow, you have the A/C on, and the battery is draining down faster that the alternator can charge it back up.
Hence OEM Valeo alternator only puts out about 14 amps when the motor is idling, and the raditor fan when running (ac turns it on) , is drawing close to 16 amps itself isntead.
So to solve this problem, you upgrade to a billet mechman alternator that is 6 pole (factory is only 3 pole) and the billet alternator will put out close to 60amps when the motor is idling instead.
https://www.corvetteforum.com/forums...w-pricing.html
