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Alternator problems....

Discussion in 'Intermediate CJ-5/6/7/8' started by sagegoat, Mar 4, 2006.

  1. Mar 4, 2006
    sagegoat

    sagegoat The good life........

    Vernal,Utah
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    I have a 1974 CJ5,304 V8. I've replaced all electrical devises,new alternator,voltage regulator,battery, It still is not charging the system from the alternator. Does anyone have a diagram of how the wirring on the back of the alternator hooks up? Maybe I hooked it up wrong?:(
     
    sagegoat, Mar 4, 2006
    #1
  2. Mar 4, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Sep 20, 2002
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    Welcome from KS! Where about you from?

    As for the alternator, you mention a voltage regulator. In 1974 they alternators were all internally regulated AFAIK. If you have an external one as well perhaps that's the or an issue?
     
    sparky, Mar 4, 2006
    #2
  3. Mar 4, 2006
    sagegoat

    sagegoat The good life........

    Vernal,Utah
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    From Vernal,Utah. The Jeep has an external voltage regulator.
     
    sagegoat, Mar 4, 2006
    #3
  4. Mar 4, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Just GMs that did away with external regulators in their alts in '68 or so and AMC still used 'em?

    Guessing someone here can help since I only have questions. ;)
     
    sparky, Mar 4, 2006
    #4
  5. Mar 4, 2006
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    No - my '77 TSM shows the Delco only used on 6 cyls by '77. Shows Motorcraft for the V8s, which looks the same as the older Prestolites.

    I think if you look at this '72 manual, it will be correct (at least for the charging circuit). http://www.c104.net/manual/Section_03.pdf
     
    timgr, Mar 4, 2006
    #5
  6. Mar 4, 2006
    sagegoat

    sagegoat The good life........

    Vernal,Utah
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    Can anyone tell me were the colored wires go on the alternator? I have a yellow,green,orange,black.
     
    sagegoat, Mar 4, 2006
    #6
  7. Mar 4, 2006
    luckyme44

    luckyme44 New Member

    sunshine coast...
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    Nov 11, 2005
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    red to bat
    green to fld
    yellow splices in to fusible link on red at solenoid
    I had to hook the sta post to a hot wire through the ignition to get it to work just make sure its only hot when the ignition is on or it will kill your battery hope that helps
     
    luckyme44, Mar 4, 2006
    #7
  8. Mar 4, 2006
    sagegoat

    sagegoat The good life........

    Vernal,Utah
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    On the back of the alternator I have two clip in connections,one clip goes inside the alternator,the other goes to a plate. the 12volt post,then there's three little post's. Also when the jeep is running I get a reading from the hot post of only 1.78 volts? Do you think the parts store sold me a bad alternator? or am I doing something wrong?
     
    sagegoat, Mar 4, 2006
    #8
  9. Mar 4, 2006
    luckyme44

    luckyme44 New Member

    sunshine coast...
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    Nov 11, 2005
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    the info I gave you was for a 76 I got the jeep in peaces took my forever to figger out what I had there was parts of three different wiring harnesses.I'll go out to the shop and get the book and see what it says
     
    luckyme44, Mar 4, 2006
    #9
  10. Mar 5, 2006
    luckyme44

    luckyme44 New Member

    sunshine coast...
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    the best I could do was take a picture and color it the one on the left is red with a white stripe goes to the ecu the red off the alt goes to a fusible link on the battery side of solenoid the whitish colored one is gray goes from the top of the alt to the regulator black alt to regulator green the same.I hope this will help sorry about the drawing :oops: View attachment 8468
    lite blue goes to solenoid
     
    luckyme44, Mar 5, 2006
    #10
  11. Mar 5, 2006
    sagegoat

    sagegoat The good life........

    Vernal,Utah
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    Thank you for your help!:) Now I'am in buisness!!! Thanks again!
     
    sagegoat, Mar 5, 2006
    #11
  12. Mar 5, 2006
    newjeep75

    newjeep75 New Member

    Toronto
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    Feb 7, 2006
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    Not sure of this has anything to do with your problem, but I had to put a Diode on mine or the Jeep wouldn't shut off when I turned the key off.

    Todd.
     
    newjeep75, Mar 5, 2006
    #12
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