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Alternator problems....

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

  1. sagegoat

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

    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. sparky

    sparky Sandgroper Staff Member Founder

    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. sagegoat

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

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

    sparky Sandgroper Staff Member Founder

    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. timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    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. sagegoat

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

    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. luckyme44

    luckyme44 New Member

    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. sagegoat

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

    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. luckyme44

    luckyme44 New Member

    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. luckyme44

    luckyme44 New Member

    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. sagegoat

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

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

    newjeep75 New Member

    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