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Thread: flat battery again

  1. #1
    cantab27's Avatar
    cantab27 is offline Level: Uber Jeep Cherokee Trailer Queen
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    Smile flat battery again

    just jumped in the pos first time in a week and battery's dead ... battery's about 4 weeks old ..no lights left on.... used to do this with old battery if left for a few days or more that's why i brought a new one
    is there a common thing that can drain power from battery while sitting for more than a couple of days... any thoughts
    cheers
    keeping it red........

    I DRIVE A BARBIE JEEP

    Quote Originally Posted by XJ4IV
    .... lol Im a jerk tonight!
    Originally Posted by bigjim350 View Post
    Think I would go that crazy too if my Jeep turned white

    http://www.youtube.com/watch?v=XGg0C...eature=related


  2. #2
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    Default Re: flat battery again

    Check all your grounds especially the main one from the head to the firewall. Next order of business is to check the ground on the alternator.
    Hey bubba get your hand off my ass,

    Some days it is just not worth it to gnaw through the leather restraints.

    R.I.P. Brian 96_XJ Perrine 1990-2011

  3. #3
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    Default Re: flat battery again

    Sometimes the alternator can drain a battery. Bad fields I think. The catch is that it will still work.
    230 hp 4.3L Chevy
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    And a bunch of other stuff

  4. #4
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    Default Re: flat battery again

    I believe this is safe, double check it before trying. Remove the ground from your battery. With everything off on your Jeep put your DVM (Digital Volt Meter) set up to read AMPs in line between the ground and the negative terminal on the battery. I seem to remember a max of 40ma is acceptable draw on a battery. If it is higher than that then you need to find the device, or the circuit that is causing the high current drain.

    We I say safe, I mean to the DVM. Most DVMs only measure very low current.

  5. #5
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    Default Re: flat battery again

    if you have a alt shop near you pull it off and send it to them i bet thats whats giving you the problem. or it could be the big boom box in the rear
    i know my spelling and grammer are bad but dont worry its not getting any better

  6. #6
    cantab27's Avatar
    cantab27 is offline Level: Uber Jeep Cherokee Trailer Queen
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    Default Re: flat battery again

    cheers guys , if it ever stops raining here i will check these things ....
    keeping it red........

    I DRIVE A BARBIE JEEP

    Quote Originally Posted by XJ4IV
    .... lol Im a jerk tonight!
    Originally Posted by bigjim350 View Post
    Think I would go that crazy too if my Jeep turned white

    http://www.youtube.com/watch?v=XGg0C...eature=related


  7. #7
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    Default Re: flat battery again

    Great, and a good day (it is really early in the morning for you)
    assuming that you did not weld on your vehicle with the battery connected the following....

    did you, measure the battery voltage with nothing on (contact off)
    readout ?? does it drop ? if so, or the battery is broken, or some of the electric wiring what transport current/voltage before contact is switched on has a short. (possible rust)

    contact on, does the voltage drops ? how much ?
    after starting the engine, does the voltage raise ? how much ?

    a battery with 6 cells if empty voltage should be 12 volts (2 volt per cell) if lower the battery is or in bad shape or on of the cells are broken (sulfate)
    if the voltage does not raise after starting the engine, (suppose to go to 13/14 volts) probably the brushes are bad and need to be replaced. if the voltage goes way beyond the 14,5 volts you should check the regulator (inside the alternator)
    in the FMS, you can find how to replace those parts.

    I will hope this will bring you to an solution

    Thomass

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