whats drawing from my alternator

Asked by Apr 06, 2016 at 11:23 AM about the 2000 Honda Civic Coupe EX

Question type: Maintenance & Repair

okay im working on an 2000 honda accord ex 2.3 vtec the batterys good and
so is the alternator i left the battery cable off last night but the car still has a
draw coming from the alternator killing the battery but like i said the battery is
good got it last year and the alternator is good what could it be??

1 Answer

83,085

If you left the a battery cable off last night and the battery was dead this AM then you have a bad battery, if a cable is disconnected then there is no way the alternator can draw power. Now of you have a draw through the alternator when the key is off, you have a bad diode inside the alternator, most bench testers won't test for a bad diode, they only check output one way, you can either choose to rebuild yours or replace it. HTH

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