2003 Liberty ?s

[DartGTDan]

My son has a 2003 Liberty (3.7L, Auto., A/C) with 75,000 miles. Driving home today the battery and engine lamps illuminated. The battery was replaced last spring. The battery and alternator terminals are clean and tight. Everything is original. Bad alternator? Other things to check out?

 

[67Dart273]

Sorry I don't know much about those. I'd check battery voltage to confirm it's not charging, yank off the alternator and find a parts store that can "test" it

 

[blown71duster]

The computer controls the charging system on those.
There should be a code stored related to the charging system causing the light to come on.
You should have a two wire plug on the alternator, one is power from pcm/asd relay and the other is field/ground control from pcm.

I would do as suggested take the alternator off and have checked , If its ok then it could be a wiring issue or bad pcm.