Internal Battery failure

Crazy4diesels

New member
Hey Guys,

Sorry I've been such a stranger lately... Been busy hiking. I've decided that life's too short to work on things forever - it's time to have some fun before I get too old. I still have the Jeeps (my 05 TJ and my 50 M38). I still drive the TJ every day, doors off - windows out - at every oppertunity. Lots of rain this summer so top's been up more than down, oh well...

Anyway, I went into a store the other day and when I came out and went to start the Jeep all I got was one loud clunk from the starter (it engaged the flywheel and shut down without turning the engine. Everything went dead at the same time - no instrument panel, no idiot lights - nothing. The battery (original) had been working fine up to that point and never sounded "weak". I saw that the neg terminal post was sunken into the case and the case was bubbled out on the side - some sort of internal failure. I jumped it with the hood down (I have permanently attached cables like a towtruck) in case it might blow up. I watched the volt meter all the way home (about 20 miles at night) in case it should "take off". It did not. The computer controlled regulator did a good job. The lights were flickering and the volt meter was drifting around but it never went over 14. After installing a new battery the ECM had to relearn its curves since all memory got erased. First time I've been stuck in my Jeep.

-John (Boston)
 

this is a week of first time's for people to have jeep trouble. i had first trouble also
 
Where in Boston were you when this happened?

This happened in the parking lot of REI in Natick at about 9 PM. The ECM has finally relearned how to idle (took a few days). While it was learning the idle would drop to near stall then shoot up over 1000 then hunt around and steady out at 600 or so. It did this at every stop I made. Now she's her old self again...

-John (Boston)
 
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