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Unread 08-03-2013, 09:53 PM   #16
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2006 TJ Wrangler 
Join Date: Apr 2010
Location: Oceanside, California
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Doesn't the PCM regulate the alternator on our Jeeps? I don't think their are internal regulators on our alternators and if that is the case it is usually either the PCM, or more commonly a wire that is intermittently shorting. I would carefully check the wring very thoroughly. If that comes up short I think the dealer can test the PCM but I have no idea of the costs. If the wiring comes up good it is more than likely a PCM issue.

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Unread 08-03-2013, 11:30 PM   #17
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2000 TJ Wrangler 
Join Date: Aug 2005
Location: Colorado
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Originally Posted by Timmay82 View Post
Doesn't the PCM regulate the alternator on our Jeeps?
Yes it does...
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alternator , charging , ecm , pcm , voltage regulator

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