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Originally Posted by 818ortega
hello, my name is sal and i need some help. i just bought a 77 blazer with a 454 engine out of a 89 chevy truck. the problem is that my battery drains unless i disconnect the battery and there is a buzzing sound that only goes away with the batt. disconected. the alternator is a 3 wire with the conector from the 89 engine spliced to the wires of the 77. i found when i disconect one of the wires from the connector the buzzing goes away. now my question is how do i make the buzzing sound go away and is what might be draining my battery. thank you any help would be appriciated and sorry for such a long post
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the alternator is most likely defective...the voltage regulator has leakage to ground...removal of the large red wire and the issue resolved will indicate that the alt. is n/g....the question is what is the correct alternator to use...amps???????