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New battery and Altenator

588 Views 3 Replies 4 Participants Last post by  juliang8
I recently swapped out my alternator and battery , and now my vehicle won’t crank or start . It had an anti theft light and engine immobilized. Terminals were then seated properly and went away . Now it won’t click , crank or start , I measured battery voltage at 12.5 when off
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Why were the battery and alternator initially replaced? Terminals were then seated as in the battery terminals?
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