Short SOMEWHERE is Killing My Battery... - JeepForum.com

 
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post #1 of 6 Old 09-07-2009, 07:49 PM Thread Starter
xjarchaeologist
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Short SOMEWHERE is Killing My Battery...

2001 XJ. It's running the stock batter and alternator. So I left the lights on one day and go jumped off. I never charged it with a charger, just let the alternator run (bad call, I know). Now, if I leave it sitting for a couple of hours and come back, it has virtually no power. I can turn the key and have the lights come one, but it's a really long crank time till it fires up. I had the battery tested at Pep Boys and they said it was all good, and pulled the neg battery cable and ran the Haynes test. Put a test light on it, pulled the alternator cables from the alternator, still on. Reattached and started pulling fuses. Still on. The only fuse I could pull to get it to shut off was fuse 16 in the PDC (Fuse #16 underhood lamp, transmission control module, radio & interior lights). I checked all my wires and couldn't find anything that was rubbing or shorting. Any ideas?


2001 Cherokee
31x10.50 Dunlop Mud Rovers, OME HD Leafs, RE Coil Spacers
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post #2 of 6 Old 09-07-2009, 08:51 PM
XJMuscle98
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Well considering that the underhood lamp, and interior lights go on when the doors or hood are opened, has it dawned on you that its pinpointing it to that fuse since you had them on?

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post #3 of 6 Old 09-07-2009, 08:53 PM
sputnik3
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I had this problem and it turned out to be that my glovebox door was open just enough to turn the light on inside
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post #4 of 6 Old 09-07-2009, 09:27 PM
Mickey_D
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Or, as I have found about 30 times in the last week (roadside assistance, I do jumpstarts on average of 10 a day...), a fully discharged battery that's over 4 or 5 years old has been killed. It's toast. It'll take a charge, it'll react fine, but let it cool down and it dies.

If you have another vehicle you can borrow the battery out of, I'd check that as well as verifying that the hood light, interior light and glovebox light are all actually off when they're supposed to be. The only way to fully check it would be to remove the radio, as the memory function on it will constantly take a minuscule amount of power.

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post #5 of 6 Old 09-07-2009, 09:45 PM Thread Starter
xjarchaeologist
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Quote:
Originally Posted by XJMuscle98 View Post
Well considering that the underhood lamp, and interior lights go on when the doors or hood are opened, has it dawned on you that its pinpointing it to that fuse since you had them on?
Doh! I feel like a real noob right now...I guess my next step is to switch batteries...I've noticed that the alternator takes a long time to get going...guess I could pull that tomorrow and get it bench tested as well...

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post #6 of 6 Old 09-07-2009, 09:56 PM
Mickey_D
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Also another thing to check is your grounds and battery posts/clamps.

These Jeeps are almost female in their desire for cleanliness. Get a little icky stuff around the clamps and they throw a hissy fit and tell you, "**** off! I ain't doin' nothin' until you clean this **** up!!!"

I ended up buying nice, pretty matching red and black clamps for mine before she stopped giving me crap. She didn't want the regular old gray ones. She wanted pretty colors under there and let me know in no uncertain terms I'd ****ed up by getting the plain ones.

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1953 Willys M100 trailer Tagalong
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