Install new alternator now light is on with key or engine running

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Toolman78

Not-quite-so-new-guy
Oct 1, 2021
19
8
3
Installed a new alternator and the alternator light is on when car is off no key in ignition. I put the old one back on and all is fine. Bad voltage regulator on new one??? I am exchanging it but curious if this ever happened to any one. Thanks. Tim
 
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