Po1637?
TECH Senior Member
Joined: Dec 2001
Posts: 5,399
Likes: 3
From: Jacksonville, FL
P1637? Generator L-Terminal Circuit. Has to do with the alternator.
www.gearchatter.com/viewtopic8806.php
www.gearchatter.com/viewtopic8806.php
TECH Senior Member
Joined: Dec 2001
Posts: 5,399
Likes: 3
From: Jacksonville, FL
Don't know what the "C" means on the end of the code, but I'd check the red exciter connection/wire at the alternator and make sure nothing has been tapped into it. When my alternator failed a few months ago it didn't throw a code - just wouldn't charge and slowly discharged the battery while driving. Might not be your issue, just my experience.
