Bad Alternator ??? - JeepForum.com
 
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post #1 of 5 Old 10-25-2001, 02:18 PM Thread Starter
JKMB
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Join Date: Oct 2001
Location: Toronto
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Bad Alternator ???

Over the last couple of days I've noticed the charge indicator on the dash slowing moving to the "-" side. I've replaced the battery and everything was OK for about a day, but then the charge dropped and the Jeep stalls. Does this sound like an alternator problem? If I let the car sit for about an hour it will start again, but then dies shortly after.


Stock 89 YJ.
A work in progress....
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post #2 of 5 Old 10-25-2001, 05:08 PM
glm 87 wrangler
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Join Date: Sep 2001
Location: Fayetteville NC
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Quick tip turn every thing off in your jeep close door so dome light is not on, radio,
AC,heat,lights,etc,dont want them on.then
while the jeep is running pull off any battery cable pos neg does not matter,if it cut off there you go alternator is bad.Carry it to an auto parts have tested if it does not cut off dios.could be bad.Hope this helps

Gary 87 Wrangler 4.2 258 with weber carb and TFI upgrade.
31/10.5 and Nutter bypass!
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post #3 of 5 Old 10-26-2001, 09:58 AM
archie
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check the fuses in the power distribution box just in front of the battery I had the same problem but found the culprit wasn't the alternator but a blown fuse (50 amp if memory serves) thanks to some one trying boost the battery with leads on backwards.

Archie
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post #4 of 5 Old 10-26-2001, 09:59 AM
archie
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check the fuses in the power distribution box just in front of the battery I had the same problem but found the culprit wasn't the alternator but a blown fuse (50 amp if memory serves) thanks to some one trying boost the battery with leads on backwards.

Archie
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post #5 of 5 Old 10-26-2001, 10:56 AM Thread Starter
JKMB
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I think it's fixed. Here's the deal.
The new battery I installed a few days ago was apparently being drained by the bad alternator. I replaced the bad alternator (literally a five minute job) and everything seems OK. At first the battery was not holding it's charge and the Jeep would die after about 2 minutes. Once I fully charged the battery it seemed to be able to hold the charge. I mistakenly assumed that if I could start the engine the battery would quickly re-charge itself - not the case. Anyway, thanks for the suggestions. If the problem returns I'll let you know.

Stock 89 YJ.
A work in progress....
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