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battery or alternator?

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Old 01-04-2011 | 01:23 PM
  #16  
Screwd up 6's Avatar
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From: Spring, TX
Year: 1994
Model: Cherokee
Engine: 4.0
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Cool deal. I hope that is not the case of my issue. I will be buying a new battery this weekend, and new grown/pos wires. After that I will test my alternator.
Old 01-04-2011 | 06:14 PM
  #17  
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From: the sticks of pa
Year: 2000
Model: Cherokee
Engine: 4.0
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Originally Posted by Diesel
That wouldnt cause overcharge though. if the alternator was overcharging, the bridge rectifier would stop working and you would just get AC going to you battery.

so you think i should just go straight for the pcm and replace it or should i still take the alternator out and have it bench tested at an autostore. i kinda have off the next couple of days so i have time to mess with it.
Old 01-05-2011 | 11:20 AM
  #18  
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From: Wantage, NJ
Year: 1995
Model: Cherokee
Engine: 4.0 I6
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Originally Posted by caddyman
so you think i should just go straight for the pcm and replace it or should i still take the alternator out and have it bench tested at an autostore. i kinda have off the next couple of days so i have time to mess with it.
Not many auto stores measure voltage out, just load test to tell you if your alternator is outputting current close to spec.
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