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Topic: 1968 C2 Bad Voltage Regulator

in Forum: C3 Electrical

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1968 C2 Bad Voltage Regulator

Posted: 9/11/20 2:51pm Message 1 of 3
fivejah
Former Member
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Auburn, WA - USA
Joined: 8/8/2020
Posts: 7
Vette(s): 1968 Corvette 454ci 4 speed

My 1968 C3's battery will not hold a charge.  Battery is new and alternator checks out good.  Could it possibly be a bad voltage regulator?  Gauge shows that it is not charging.




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Re: 1968 C2 Bad Voltage Regulator

Posted: 9/11/20 6:23pm Message 2 of 3
73shark
Limited Member
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Overland Park, KS - USA
Joined: 7/9/2003
Posts: 914
Vette(s): 1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day. 2023 Accelerate Yellow HTC Stingray

What voltage is the alternator putting out with the engine running? If the battery is not fully charged, it should be putting out 14+ volts.




1973 L-82 4 spd

Re: 1968 C2 Bad Voltage Regulator

Posted: 9/12/20 6:21am Message 3 of 3
manchestershark
Lifetime MemberLifetime Member
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Equinunk, PA - USA
Joined: 10/31/2007
Posts: 2465
Vette(s): 1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.

Sounds like a bad diode. Charging, but draining back through the alternator. Charge the battery to 14.2, then disconnect it. If it holds while disconnected, you have a drain in the system. 





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in Forum: C3 Electrical


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