Battery keeps dieing after a day of driving! - JeepForum.com

 
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post #1 of 13 Old 03-09-2003, 03:59 AM Thread Starter
Road Racer
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Battery keeps dieing after a day of driving!

I give my battery a full charge and it's good for a day of driving then it gose dead. I brought the GC to Autozone to have my chargeing system checked out and they said my battery is fine and my charging system is putting out 14 volts and its good.
When I give my battery a full charge the charging system gauge reads about 10 and as I drive it slowly goes to 9 which is as far left as it can go. The gauge should read around 14 amps, it dose not. QUESTION: If my alternator (charging system) was good would 'nt the gauge read 14 insted of 9?????
Autozone said it was fine but why is it not charging my battery???? I put a diffrent battery in the GC and it dose the same thing.
Has any one ever had this problem?? PLease Help!


93 Jeep Grand Cherokee Larado, 4.0 inline six.
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post #2 of 13 Old 03-09-2003, 11:03 AM
Big Dumb White Guy
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are you reading the gage on the dash? POS gages... that gage takes a reading from like after the headlights get their power or something like that. it's really stupid.

other thing. while it is running check the volts at the battery.

it may be a short somewhere sucking the power....

i had the same thing. try to find a GOOD electrical place. i found here and they said everything they checked is good. so i made my own Battery cables. you can get the connectors, $11 a pair (military spec), go here http://www.premierpowerwelder.com/te...terminals.html . that's where i got mine. then get some 1 gage welding wire. i spent about $35 for 25ft of it. have them add the other connectors (they have to be crimped on).

haven't had to do anymore since then...

good luck.

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post #3 of 13 Old 03-10-2003, 05:31 AM Thread Starter
Road Racer
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Yes, the dash gauge should read 13.5 to 14 volts. The battery reads 12 volts. The volts comming from the alternator is 14 volts.

93 Jeep Grand Cherokee Larado, 4.0 inline six.
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post #4 of 13 Old 03-10-2003, 12:17 PM
97RedBird
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Do you have an aftermarket sound system. Stereo Amps can take most of the Alternators output and the battery doesn't get enough to charge. I would test the voltage on the battery as stated above. The alternator or a short would be the problem.
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post #5 of 13 Old 03-11-2003, 12:11 PM Thread Starter
Road Racer
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Quote:
Originally posted by Road Racer
Yes, the dash gauge should read 13.5 to 14 volts. The battery reads 12 volts. The volts comming from the alternator is 14 volts.

No,I do not have a sound amp just the stock sound system. My battery outputs 12volts and my alternator outputs 14 volts.
That is what Autozone told me when they checked my battery and alternator. I don't know how accurate Autozone is. Should I just buy a new alternator and swap it out? Or should I just bring it to a shop and have it checked out. I figured I could save some money if someone on the forum had the same problem.
If my alternator was good the gauge in my dash should read around 13 or 14 volts but the gauge in my dash only reads 9 which is as far left as it can go. From that I would assume that my alternator is not working. However Autozone says my alternator is fine.

93 Jeep Grand Cherokee Larado, 4.0 inline six.
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post #6 of 13 Old 03-11-2003, 08:26 PM
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1st thing you should do is change the battery cables. It may not
fix your problem but it may and its cheap. About $20 . If thats not it go to a shop and have them check your altenator again.
Most shops will check it out for free.. Like Big Dumb White Guy
said it could be your cables, I had a similar problem a while back
I put new end on my cables ,
Problem solved...

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post #7 of 13 Old 03-12-2003, 04:55 PM
Kess
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do ur own little test on the alternator, start the jeep, and pop the hood and disconnet the neg terminal of the batt, if it dies ur alternator is shot, if not ur alternator is fine, and should read right close to 12volts

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post #8 of 13 Old 03-15-2003, 08:30 AM Thread Starter
Road Racer
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OK, I took battery cable off with engine running and engine kept running which means alternator is good. I reconnected battery and gauge in dash read 14, good charging system.
Now, after a few minutes of running gauge in dash went down to 9, I disconected battery and engine died. So sometimes its good sometimes its bad, What the heck? I cleaned off contacts in fuse box and battery and same thing happens, sometimes alternator charges and sometimes it dose not. Still confused Please HELP!

93 Jeep Grand Cherokee Larado, 4.0 inline six.
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post #9 of 13 Old 03-16-2003, 05:17 AM Thread Starter
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I tapped the alternator while jeep was running and the needle on the gauge in the dash jumped from 9 to 14. Could that mean that the alternator is ready to shiit the bed?

93 Jeep Grand Cherokee Larado, 4.0 inline six.
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post #10 of 13 Old 03-16-2003, 06:39 AM
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I can tell you right now that when you took it to AZ., most of the people there dont know that there equip needs to be fixed . In our case at AZ we had at least 100 people come in when ours was broken and one of the guys I worked with didnt even know that it was broken. I would bet that it will be you alt. I have tested and replaced over 200 at az and everyone that I had tried to get them to buy an alt that day said they will wait it out. A couple of days later they came back and bought an alt. And also the reading on the machine should be 75% of the total AMPS not volts, and not less. I would take it back and have someone who can use the machine go out and look at it.
any more ? pm me

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post #11 of 13 Old 03-17-2003, 04:41 PM Thread Starter
Road Racer
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I replaced the alternator and everything works great the way it should. The dash gauge reads a steady 14. Thanks for your help.

93 Jeep Grand Cherokee Larado, 4.0 inline six.
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post #12 of 13 Old 03-18-2003, 12:57 AM
Ryan2son
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How much was your alternator?

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post #13 of 13 Old 03-18-2003, 09:17 AM Thread Starter
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Autozone wanted $100.00 for theirs but from past experience I never buy Alternators or Starters from Autozone or V.I.P.
I paid $140.00 from a more reputable auto parts dealer. The dealership wanted $225.00 for theirs, Yeah right! I removed the battery and the battery tray, then I was able to swap out the alternator with no problems, half hour total time.

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