2003trailblazer

Asked by Guru52K9J Jun 12, 2018 at 02:04 PM about the 2003 Chevrolet Trailblazer

Question type: Maintenance & Repair

Brand new battery alternator good but will not run. Jump it but dies after drive
around block.

1 Answer
11,265

FJ4072 answered 5 years ago

Triple check your connections at the battery. Have your system checked for parasitic drain. Also, it is possible the diodes are bad in your alternator that tested good. When diodes go bad, will test good, however it will be producing AC current not DC current, therefore, not charging your battery. Can even happen with your vehicle off.

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