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Old January 29th, 2013, 10:58 AM   #6
Flexin' XJ
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Originally Posted by 87mopar View Post
Pcm Issue? It's rare but I have seen it. IIRC the voltage is controlled by the pcm
That is the worst case for me since I have already spent the money on an alternator. PCMs are rare so it wasn't my first thought thta it would be bad.

Originally Posted by hawkscj5 View Post
with those values i would venture to say the alt. is defective.
I just got another alternator from the parts store and am about to install it so we'll see.

Originally Posted by deerebowtie View Post
PLIS wiring plug on the alt? jumper 12v to the S terminal and see if your lights perk up. If not, I'd suggest checking grounds and having your battery/alt tested.
Already checked the grounds, cables and wiring. Battery is brand new yesterday as is the alternator.
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