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So, I bought a scanner today , I showed no codes . I charged the battery last night. I started it this morning and it showed 12 volts. I turned the air ,the high beams, the interior lights and the radio on . it sat at 12v for a minute and then dropped to 9v. I hooked my truck up to it and shut...

:wub::?|

Sorry , multiple posts

I tried using the check engine light and trip/set button but all I got was a 23 and one quick flash fo the check engine light after the diagnostics .It's my Step-daughter's jeep so I don't have a manual or code reader .When I start it cold it shows around 12 volts on the gauge but it will...

Haven't checked yet but will get back as soon as I do

Hello, I'm new here .I have a question about a 1998 jeep cherokee 4.0 . I've tried the search but haven't come up with the answer to this problem.When it's cold and you start it it isn't charging .I can jump it off and it will start charging again. I was thinking it may be a faulty alternator...