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Thread: 19v charge WTF???

  1. #1
    TheRo0sTer's Designs TheRo0sTer's Avatar
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    USAF 19v charge WTF???

    So I put the battery back into the TJ after having it out for a few days to start an old VW Bus. Well I put it in, the charge was gone (no biggie I jumped it) and drove down the street. Everything looked good at 14v on the gage and then the alarm telling me to check my gages goes off. I look them over and it's at 19v! I turn around since I'm just around the corner from the house and park it. I shut it down and restart the Jeep. Zero issues and drive off again to test it. Bing alarm again as I see the gage spike to 19v. I don't get it, not a single issue to the point of removing it. I plan on taking the batt out and having it checked for other than the obvious and then the Alternator if the battery checks good. Do any of my brother have any ideas other than what I've posted above?

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    Administrator korisu56's Avatar
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    Ground? If it wasn't grounded it wouldn't start or run. No idea. haha.

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    Senior Member cowboy63b's Avatar
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    could be the altinator screwin with ya.
    Quote Originally Posted by Irish_Assassin View Post
    I'd jump all ovet that waggy!!!
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    Got Beer airforce26yrs's Avatar
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    Sounds like the voltage regulator. Check the voltage with a meter at the battery when this is happening, if it reads 19v your regulator is shot, if it is 14 more or less then it is a gage issue. I cooked a battery once on an old 8N farm tractor because the regulator was shot.
    I'm Mike, make sure you spell it right, because I do not want to get the wrong A$$hole in trouble.

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    What he said. Sounds like voltage regulator to me also.

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    TheRo0sTer's Designs TheRo0sTer's Avatar
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    Quote Originally Posted by airforce26yrs View Post
    Sounds like the voltage regulator. Check the voltage with a meter at the battery when this is happening, if it reads 19v your regulator is shot, if it is 14 more or less then it is a gage issue. I cooked a battery once on an old 8N farm tractor because the regulator was shot.
    I'll check it out today. Thanks for the advice!

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    Administrator korisu56's Avatar
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    Where's the regulator located?

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    TheRo0sTer's Designs TheRo0sTer's Avatar
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    There isn't one on a TJ its built into the Alternator.

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    Senior Member cowboy63b's Avatar
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    hence why i said the altinator
    Quote Originally Posted by Irish_Assassin View Post
    I'd jump all ovet that waggy!!!
    If I offend anyone tonight, I apologize. That's not my intention. I'm not going to guess what your personal line of decency is. I cross my own from time to time. It's how I know I still have one. not that i actually cared in the first place.


    "Cougar or not, I'd bang both those broads like a f***ing retard with a tambourine in each hand"

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    Senior Member HillBillE's Avatar
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    Quote Originally Posted by TheRo0sTer View Post
    There isn't one on a TJ its built into the Alternator.
    Nope. It's all in the computer, or ECU.

    I had the same problem on my '99 XJ, pulled my damn hair out trying to figure it out.

    Mine turned out to be a few bare wires in the main harness, one of which the ECU 'grounds' when the batt needs charging. It was grounding out on the fuel rail, making the alt think the bat needed charging.

    You need to find a good wire diagram, find the 2 wires to the ALT from the ECu plug, and check them.


    My harness was rubbing on the fuel rail, from where the 'vacuum ball' was relocated when the aftermarket front bumper went on.

    After a few years, it wore through, cuasing and 'overcharge' condition.

    Check your main harness. You should be able to find the colors of the 2 wires at the ALT, and trace them back to the ECU plug.


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