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Need Help Identifying GM Alternator

Discussion in 'The Hokey Ass Message Board' started by 51ChevPU, Jan 30, 2010.

  1. 51ChevPU
    Joined: Jan 27, 2006
    Posts: 1,047

    from Arizona

    I have what is believed to be a 3 wire GM alternator with the internal regulator. I bought it at a swap so now I need to confirm. It has the typical one large lead on the back of the alternator for the power and then a Field 1 and 2 next to each other on the perimeter of the housing. I tried to take some numbers off of it, so here's my best shot at it. The numbers are in two rows, the top row is 1 102913 61 ? and the bottom row is SK 1--12v NED.

    I'd like to confirm that its a 3 wire and the amount of amps it will generate.

    Thank you for your assistance.
  2. BillM
    Joined: May 26, 2007
    Posts: 246


    Google "GM alternator identification" .
  3. squirrel
    Joined: Sep 23, 2004
    Posts: 30,570


    are the terminal pins in a straight line, or parallel to each other?

    straight: -- --

    parallel: | |

    if it's straight it's internal, if they're paralle it's external regulator
  4. fordcragar
    Joined: Dec 28, 2005
    Posts: 3,073


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  5. Mr48chev
    Joined: Dec 28, 2007
    Posts: 19,338


    This guy put some serious time into putting this article together an it is simple to follow.
    Be aware that he is converting a Land Rover to a Delco alternator but it is a great source of Delco alternator info as far as the alternators we would most likely be interested in running.
  6. 51ChevPU
    Joined: Jan 27, 2006
    Posts: 1,047

    from Arizona

    Thanks everyone. That was very helpful. Looks like I have a 3 wire with internal regulator.

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