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Originally Posted by kongwrench
'92 chev lumina van 3800
Boosted a truck and now the altenator is not charging the battery.
Replaced the alt with an oem rebuild and it is still not charging. Reading 11-10 volts at the battery with a slow drop while the engine is running.
Reading 1.4V at the large red wire at the alt, is this right?
Cables are clean and tight. Belt is tight with no abnormal noise.
Sorry if this is a redundant post, I am new to this great forum and could not find any simular posts with this same issue.
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one more thing if the alt regulator shorted this could have opened the fuseable link in the wire from battery to alt. [big red wire].........another one more thing charge battery before you complete this repair no sense in damaging new alt by overloading with a half dead battery......