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Bad Alternator or Battery?

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Old Dec 19, 2012 | 12:08 PM
  #1  
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From: West Warwick, RI
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Engine: 4.0L High Output
Default Bad Alternator or Battery?

Battery is only two years old, I do not think the Alternator is more than 4 Years Old. Jeep sat for a half hour, and when I came out it was clicking really fast like the battery was dead. Check Engine light was on, turned off the Jeep and went inside to research. Same scenario this morning, except Check Engine light was off. Also, Steering Wheel is very hard to turn when it does this, (YES I CHECKED THE RESEVOIR). Only other thing I can think of is the belt to the Alt is loose, or maybe a bad Starter? Thanks for help in advance.

P.S. Going to have volts tested later this afternoon.
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Old Dec 19, 2012 | 12:09 PM
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Mine went out at the same time... Literally haha I'd check your battery first. But it's could be your alternator if it's not keeping the battery charged.
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Old Dec 19, 2012 | 12:15 PM
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Thanks! I expected that. About the C.E light, I heard it can be emissions related issues. Is this true? Sounds like a normal 4.0. I think the light is for the Alt. IMHO.
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Old Dec 19, 2012 | 12:57 PM
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No. When my alternator and battery were messing up. My check engine light would come on due to the alternator.
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Old Dec 19, 2012 | 12:58 PM
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So yes your right lol and is your light on nonstop?
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Old Dec 19, 2012 | 01:44 PM
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Yes. Until I turn it off and then back on. Then it goes off. :/
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Old Dec 19, 2012 | 01:49 PM
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Imma bet it's your alternator
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Old Dec 19, 2012 | 02:29 PM
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Thanks!
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Old Dec 19, 2012 | 02:38 PM
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Pull both battery and alternator..have em tested (bench tested)..Clean all the connections and grounds..Replace if they test bad, reinstall if they test ok..Mine did the same ****..tested good, cleaned connections..no more problems..
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Old Dec 19, 2012 | 02:44 PM
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Originally Posted by Xj88
Pull both battery and alternator..have em tested (bench tested)..Clean all the connections and grounds..Replace if they test bad, reinstall if they test ok..Mine did the same ****..tested good, cleaned connections..no more problems..
Just a damp cloth and a wire brush will work?
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Old Dec 19, 2012 | 03:01 PM
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Just a wire brush..doesnt have to be sparkling clean..just not caked with dirt..I cleaned all contacts on the alternator, and cleaned battery leads and terminals.
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Old Dec 19, 2012 | 06:51 PM
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Will be the first thing on my list tomorrow. Thanks for your help, don't know what I'd do w/ out you people.
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Old Dec 19, 2012 | 06:58 PM
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baking soda and water mix or Coke works great also
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Old Dec 19, 2012 | 07:23 PM
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You mention that you have seen a "check engine light".

My strategy for when a check engine light is present is always the same. Start by pulling the code! Use the technology provided to you by your Jeep. Why guess? And the best thing is that for a 95, you can check codes on your own without a code reader in about 5 minutes. Here is how.
---------------------------------------------------------------
Retrieving OBD codes on the Jeep Cherokee (XJ)
OBD1 Models: 1991-1995

1) Start engine (if possible). Move transmission shift lever
through all positions, ending in Park. Turn A/C switch on and then off
(if equipped).
2) Turn engine off. Without starting engine again, turn
ignition on, off, on, off and on within 5 seconds. Record 2-digit
fault codes as displayed by flashing MIL.
3) For example, fault code 23 is displayed as flash, flash,
4-second pause, flash, flash, flash. After a slightly longer pause,
other codes stored are displayed in numerical order. When MIL begins
to flash fault codes, it cannot be stopped. Start over if count is
lost.

NOTE: A "5-5" will always occur to signal the end of the sequence. Some will flash the "1-2" code indicating a recent battery disconnect even if you haven't done it. Ignore these two codes, and mark down all others.
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Old Dec 19, 2012 | 07:39 PM
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don't forget to touch your nose twice while you do all that.

really, just boost your jeep and when it starts, pull the cables. if it stalls out, your alternator is toast.

if it stays running, it will either charge the battery if the battery is any good, or it won't charge the battery if the battery is toast.

another way to tell is hold a screwdriver up to the alternator while it's running, if there is a magnetic draw, your alternator is working...
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