C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Charging System Problem Help!!!

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Old Jun 10, 2006 | 11:42 AM
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Default Charging System Problem Help!!!

Here's the problem on the 85, new alternator and battery. Still does not charge properly, anyone had a similar experience? If so what the fix.

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Old Jun 10, 2006 | 11:49 AM
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Clean all primary cable connections. At the battery, at the starter and at ground points.
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Old Jun 10, 2006 | 12:19 PM
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Okay, where are the grounds located onthis car.

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Old Jun 10, 2006 | 12:56 PM
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
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Have you checked the voltage output at the alternator and at the battery? With a car of that age you could likely be experiencing significant voltage drop due to aging wiring. Are the belt and tensioner in good shape so there is no slippage? You can't always hear this as belt squeal. Did you buy a quality alternator and have you had the new battery load tested? Even new batteries are defective sometimes.
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Old Jun 10, 2006 | 01:47 PM
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Every thing has been checked, voltage from alternator correct, battery tested great, but no voltage from alternator to battery.

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Old Jun 10, 2006 | 01:54 PM
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
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Originally Posted by ROCKY85
Every thing has been checked, voltage from alternator correct, battery tested great, but no voltage from alternator to battery.

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ROCKY 85
Simple fix then, your main charging wire from the alternator is broken or otherwise defective. Run a new 10 ga. wire from the screw on post at the alternator to wherever it's connected to the positive battery voltage on your year of car. This should take care of it.
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Old Jun 10, 2006 | 11:08 PM
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No no no no no! Don't run a solid wire, unless you don't want your insurance to cover you for a possible car fire in the future. There is a 12 GA fusable link in between the alternator and the battery. It could have blown out. Mine did this one. You'll have to take the battery out to find it. It is buried down behind it amongst a bunch of other wires. It'll be a black cylinder looking thing with red wire coming out of both ends of it.
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Old Jun 10, 2006 | 11:26 PM
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From: Good health is merely the slowest possible rate at which one can die
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Originally Posted by scorp508
No no no no no! Don't run a solid wire, unless you don't want your insurance to cover you for a possible car fire in the future. There is a 12 GA fusable link in between the alternator and the battery. It could have blown out. Mine did this one. You'll have to take the battery out to find it. It is buried down behind it amongst a bunch of other wires. It'll be a black cylinder looking thing with red wire coming out of both ends of it.
No doubt a good point. I sometimes forget how prevalent fusible links have become since I began working on cars at which time they were non-existent. The HD vehicles I work on for a living generally use 2 or 4 ga. wire for charging and so there are no fusible links there either.
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Old Jun 11, 2006 | 06:04 AM
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Originally Posted by scorp508
No no no no no! Don't run a solid wire, unless you don't want your insurance to cover you for a possible car fire in the future. There is a 12 GA fusable link in between the alternator and the battery. It could have blown out. Mine did this one. You'll have to take the battery out to find it. It is buried down behind it amongst a bunch of other wires. It'll be a black cylinder looking thing with red wire coming out of both ends of it.
there is a bundle of red wires behind the battery (fusable link). I would as scorp said, check there and make sure they are not loose and are good and tight.
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