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Dead battery...

Discussion in 'Early CJ5 and CJ6 Tech' started by Patrick, Nov 12, 2005.

  1. Nov 12, 2005
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    A couple months ago, I went out to start the Jeep to go to work, and the battery was dead.... I mean DEAD.. Jump started the Jeep, drove to work, and it's been fine..... This afternoon, I went to start the Jeep, and the battery was dead again.... I mean DEAD.... Jumped it with the Lumina, went over to Dad's, put it on the charger for an hour; the battery is still not up to par....... I'm not sure what's going on.. There is no drain ( I'll check as soon as I can find my @%^%$ test light....) Maybe I shouldn't let the Jeep sit for a day and a half.....
     
  2. Nov 12, 2005
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Bad battery? If no drain, ?
     
  3. Nov 12, 2005
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    Yeah, but it's fine other than these two times.... Seems like I've seen it all, being an automotive tech... If a customer brought me a vehicle with these symptoms, I'd think they were crazy...:D
     
  4. Nov 13, 2005
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    My truck likes to mess with me. Over the years I've had it all of the sudden not start numerous times because of a faulty ground.
     
  5. Nov 13, 2005
    Uncle Jeep

    Uncle Jeep Snow in the desert??

    No longer in NM!!!
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    Feb 20, 2004
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    37
    Good luck Patrick. I went through this same stuff with my '63 chevy P/U. I actually carried a second battery with me just to jump the truck. It seemed that my Crane box and my stock alternator didn't like one another.
     
  6. Nov 13, 2005
    CT

    CT Member

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    Before you try to check out the whole wiring system and rewire the jeep to find the problem. Do something simple like putting another good (or better yet a new) battery on it. Clean your battery cables at both ends.
     
  7. Nov 13, 2005
    coby61

    coby61 Stupidiotic Member

    Prunedale CA
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    Mar 10, 2004
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    Patrick, sounds like a faulty ground to me. Each time this has happend did you hit any bumps in the road or go wheelin? A friend had this problem a while back he woulld go wheelin and knock some thing loose and it would drain the batt.
     
  8. Nov 13, 2005
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    Battery terminals are clean, tight, etc. Trust me, I keep my stuff in good shape..... Fixin' to go out now and see if it's dead again..... I'll bet it's fine..

    edit... yup, it's fine this morning...
     
  9. Nov 13, 2005
    rocnrol

    rocnrol Member

    calgary alberta,...
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    Oct 11, 2004
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    do you have the "normal" type of battery patrick? its not like an optima type is it? what i am getting at, is if it is a lead plate type, i wonder it one or two of the plates are a little dameged from vibration, and then they end up touching one another now and again.
     
  10. Nov 13, 2005
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    It's just an Auto Zone Dura Last..:oops:..
     
  11. Nov 13, 2005
    tgregg

    tgregg Member

    Oak Hills, CA...
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    Apr 14, 2005
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    Have you load tested it, could be bad cells. If I remember correctly, Autozone will test your battery and if it is bad will replace it. Might help to at least elliminate that as a problem.
     
  12. Nov 13, 2005
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    I'll load test it at work...... It'll test fine, I'm sure..... I suspect something else is draining the battery, besides the normal parasitic load.....
     
  13. Nov 13, 2005
    Old Bill

    Old Bill Aggressively passive....

    Really Southern...
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    Patrick, Nothing you haven't seen before, but just maybe not....

    I had a '64 Chebby 1/2 ton that we spent the better part of 2 weeks figgerin' out why the thing would sometimes start, sometimes not, it would stall just going down the road, all kinds of goofy stuff. We finally replaced the battery after checking (and re-re-re-checking) everything else. Seem to remember Dad thinking it was a couple cells shorting out inside the battery.
     
  14. Nov 13, 2005
    Uncle Jeep

    Uncle Jeep Snow in the desert??

    No longer in NM!!!
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    Are you running anything electronic?(MSD box, fan, fuel pump, amps, etc..) Like I posted earlier, I ran into the same problem with my truck. The battery might be fine but your charging system could be in trouble or just not strong enough to keep up with the demand. My truck would run fine and the next day the battery would be dead.
     
  15. Nov 13, 2005
    Desert Runner

    Desert Runner Member 2020 Sponsor

    Hickory, Pa
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    Sep 11, 2005
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    459
    I found I have a small drain in my Jeep. After beating my brains out trying to find it, I installed a battery disconnect. Now when I park it for more than a day, I pop the hood and flip the switch. I havn't had the battery go dead for over a year.:rofl:

    jay
     
  16. Nov 13, 2005
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    No, nothing like MSD, fuel pumps, etc. My charging system is fine; I run a 100 amp single wire delco..... This has happened twice in the last 6 months........ This is why it is a mystery to me... My alternator is good; my battery terminals are good......The only load on the battery is the memory for the CD player... I know all of the basics..... I hate to be short, but I diagnose things of this nature for a living...... This has me over a barrel, however...
     
  17. Nov 13, 2005
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    That's the problem with doing it for a living and working on your own vehicle. On a customers vehicle you're gonna have already checked what was mentioned, but you "know" you're own vehicle so you might tend to rule things out automatically and overlook the problem. ;)
     
  18. Nov 13, 2005
    CT

    CT Member

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    I wonder if maybe you might have a faulty switch. Perhaps the ignition switch might be covered on the backside with some light grit or grime from the positive terminal tab that also touches the outside of switch housing. If so, it could allow a small amount of positive voltage current to ground out when the weather was real humid. Not sure if this makes since, just a thought out of the blue. Take a mirror, get on the floorboard and look at the backside of your electrical switches. Don’t forget the horn button. Might be time to remove the rubber cover and get some Emory cloth and just clean up the brass contacts a bit.
     
  19. Nov 13, 2005
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    I understand what you're saying Glenn, but trust me, I know My Jeep and have already checked the obvious... I do every time I go on a long trail ride........:v6:
     
  20. Nov 13, 2005
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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