Hello All;
I have a 2004, 5.3L, about 135K.
Here's what I know. Relitavly new battery, tested with a meter, off: 12.43, running w/bat. light and message(1):~12.4 / running wo/bat. light or message(2) ~14.5.
Step son has been driving for about 5 months. It had been parked for about a year before that. He comes home last night and says the light is on (and Oh, BTW, it has been on for about 2 weeks), Now the message center display says it's not charging. I didn't test it last night because it was raining. Checked this morning and no light or message. Shut it off and checked the battery, ~12.43V. Started it up, again no light, no messsage, tested at about 14.5V. While letting the truck idle, I read a few postings on here and fiddled with the plug to make sure it was getting a good conection. Checked the connections at the battery terminals and the ground could have been tighter. So I shut it off (it had been running for about a half hour still with no light, no message, and about 13.2V on the meter. I wire brushed the terminals and tightened. Started it up and now I have the light and the 'Battery Not Charging' message again. Checked it with the meter again and it's NOT charging. I let it sit for about and hour, but it's still hot and the light and message are still there and it's definatly not charging.
I'll check again when it's completly cold and see if this cycle repeats.
Is there something that could work when it's cold and then not work when i's hot? I don't just want to replace parts for no reason if i can pin point the problem.
Any thoughts or suggestions?
Thanks,