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High voltage

Discussion in 'Cherokee' started by Missfixit90, Dec 4, 2017.

  1. Dec 4, 2017 at 1:10 PM
    #1
    Missfixit90

    #1
    Missfixit90 [OP] New Member

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    I am putting out 19 amps off of my alternator(newly installed) and volts are reading high. I am assuming whatever regulates the voltage is bad. I have a black box mounted to the outside of the alternator. Hellllp its killing my battery life. Any help would be great.

    20170525_200850.jpg
     
    Missfixit90, Dec 4, 2017
    #1
  2. Dec 4, 2017 at 1:29 PM
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    Prerunner1982

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    Prerunner1982 Well-Known Member

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    Just to verify you did check the voltage at the battery with a volt/multi meter?
    Your voltage regulator is in the computer.

    You could possibly wire in an external regulator. I have never done this though I remove one from my 93 XJ that a previous owner decided it needed.....for unknown reasons. It quite on me and left me stranded, removed it and the Jeep ran fine.

    Welcome from Oklahoma.
     
    Prerunner1982, Dec 4, 2017
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    JKBob 25 likes this.
  3. Dec 4, 2017 at 1:45 PM
    #3
    aggrex

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    aggrex Well-Known Member

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    Welcome to jeeps.net! If your alternator is producing 19 volts, most likely the voltage regulator within the unit has failed.
     
    aggrex, Dec 4, 2017
    #3
    JKBob 25, Bob and chris4x4 like this.
  4. Dec 4, 2017 at 6:30 PM
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    JKBob 25

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    JKBob 25 Well-Known Member

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    Welcome to the forum Missfixit90.
    Let us know how you make out.
     
    JKBob 25, Dec 4, 2017
    #4
  5. Dec 5, 2017 at 5:31 PM
    #5
    Missfixit90

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    Missfixit90 [OP] New Member

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    Ive replaced the alternator, and have used a multi meter. My next move will be to remove that "black box" that has no part number and has many many people confused and dont know what it is, and wire in an external regulator.
     
    Missfixit90, Dec 5, 2017
    #5
  6. Dec 6, 2017 at 8:39 AM
    #6
    Prerunner1982

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    Prerunner1982 Well-Known Member

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    As far as I have found the black box is nothing more than to organize the wires to make it easier for the technician to reattach.
    I may bust the one open on my parts XJ just for shits and giggles.
     
    Prerunner1982, Dec 6, 2017
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    JKBob 25 and chris4x4 like this.
  7. Dec 6, 2017 at 12:47 PM
    #7
    Missfixit90

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    Missfixit90 [OP] New Member

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    Well if you do let me know whats inside because my battery needle is buried in the red. Ive gotta figure somethin out
     
    Missfixit90, Dec 6, 2017
    #7
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