Results 1 to 2 of 2

Thread: Alternator Buzzing / Noise with key off

  1. #1
    Van Enthusiast brentlehr's Avatar
    My Van(s):
    1989 A/T Vanwagon - 2 WD x 2 1986 A/T LE - 2WD
    Join Date
    Jan 2012
    Louisville, KY
    Rep Power

    Alternator Buzzing / Noise with key off

    Hey folks,

    I just replaced the alternator in the 89 I'm selling and came out to a dead battery. Thought I left lights on or something, so I charged it up and same thing the next morning. Charged it up again and starting poking around. I noticed a buzzing coming from the alternator when the key is off, so my thoughts are there's something internal in the alternator that's drawing current with the key off.


    With a fresh battery it fires right up and runs super smooth. Problem didn't start until I put the new alternator in. Before I pull it out and take it for testing I'd appreciate any tips on simple things I might be overlooking.

  2. #2
    Van Fan Mojoworkin's Avatar
    My Van(s):
    '89 2WD LE
    Join Date
    May 2018
    Campbell CA
    Rep Power

    Re: Alternator Buzzing / Noise with key off

    The good news is, I think I know what's up. The bad news is that you've got a brand-new bad alternator. Specifically, the diode.

    I was already thinking about the diode, then I saw the part about the buzz.

    Also, don't take my word as final until you've Googled, heard back from other TV'ers, talked to the folks at your LAPS, consulted the Oracle of Athena, etc.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts